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PhD Defence Process: A Comprehensive Guide

Embarking on the journey toward a PhD is an intellectual odyssey marked by tireless research, countless hours of contemplation, and a fervent commitment to contributing to the body of knowledge in one’s field. As the culmination of this formidable journey, the PhD defence stands as the final frontier, the proverbial bridge between student and scholar.

In this comprehensive guide, we unravel the intricacies of the PhD defence—a momentous occasion that is both a celebration of scholarly achievement and a rigorous evaluation of academic prowess. Join us as we explore the nuances of the defence process, addressing questions about its duration, contemplating the possibility of failure, and delving into the subtle distinctions of language that surround it.

Beyond the formalities, we aim to shed light on the significance of this rite of passage, dispelling misconceptions about its nature. Moreover, we’ll consider the impact of one’s attire on this critical day and share personal experiences and practical tips from those who have successfully navigated the defence journey.

Whether you are on the precipice of your own defence or are simply curious about the process, this guide seeks to demystify the PhD defence, providing a roadmap for success and a nuanced understanding of the pivotal event that marks the transition from student to scholar.

Introduction

A. definition and purpose:, b. overview of the oral examination:, a. general duration of a typical defense, b. factors influencing the duration:, c. preparation and flexibility:, a. preparation and thorough understanding of the research:, b. handling questions effectively:, c. confidence and composure during the presentation:, d. posture of continuous improvement:, a. exploring the possibility of failure:, b. common reasons for failure:, c. steps to mitigate the risk of failure:, d. post-failure resilience:, a. addressing the language variation:, b. conforming to regional preferences:, c. consistency in usage:, d. flexibility and adaptability:, e. navigating language in a globalized academic landscape:, a. debunking myths around the formality of the defense:, b. significance in validating research contributions:, c. post-defense impact:, a. appropriate attire for different settings:, b. professionalism and the impact of appearance:, c. practical tips for dressing success:, b. practical tips for a successful defense:, c. post-defense reflections:, career options after phd.

Embarking on the doctoral journey is a formidable undertaking, where aspiring scholars immerse themselves in the pursuit of knowledge, contributing new insights to their respective fields. At the pinnacle of this academic odyssey lies the PhD defence—a culmination that transcends the boundaries of a mere formality, symbolizing the transformation from a student of a discipline to a recognized contributor to the academic tapestry.

The PhD defence, also known as the viva voce or oral examination, is a pivotal moment in the life of a doctoral candidate.

PhD defence is not merely a ritualistic ceremony; rather, it serves as a platform for scholars to present, defend, and elucidate the findings and implications of their research. The defence is the crucible where ideas are tested, hypotheses scrutinized, and the depth of scholarly understanding is laid bare.

The importance of the PhD defence reverberates throughout the academic landscape. It is not just a capstone event; it is the juncture where academic rigour meets real-world application. The defence is the litmus test of a researcher’s ability to articulate, defend, and contextualize their work—an evaluation that extends beyond the pages of a dissertation.

Beyond its evaluative nature, the defence serves as a rite of passage, validating the years of dedication, perseverance, and intellectual rigour invested in the research endeavour. Success in the defence is a testament to the candidate’s mastery of their subject matter and the originality and impact of their contributions to the academic community.

Furthermore, a successful defence paves the way for future contributions, positioning the scholar as a recognized authority in their field. The defence is not just an endpoint; it is a launchpad, propelling researchers into the next phase of their academic journey as they continue to shape and redefine the boundaries of knowledge.

In essence, the PhD defence is more than a ceremonial checkpoint—it is a transformative experience that validates the intellectual journey, underscores the significance of scholarly contributions, and sets the stage for a continued legacy of academic excellence. As we navigate the intricacies of this process, we invite you to explore the multifaceted dimensions that make the PhD defence an indispensable chapter in the narrative of academic achievement.

What is a PhD Defence?

At its core, a PhD defence is a rigorous and comprehensive examination that marks the culmination of a doctoral candidate’s research journey. It is an essential component of the doctoral process in which the candidate is required to defend their dissertation before a committee of experts in the field. The defence serves multiple purposes, acting as both a showcase of the candidate’s work and an evaluative measure of their understanding, critical thinking, and contributions to the academic domain.

The primary goals of a PhD defence include:

• Presentation of Research: The candidate presents the key findings, methodology, and significance of their research.
• Demonstration of Mastery: The defence assesses the candidate’s depth of understanding, mastery of the subject matter, and ability to engage in scholarly discourse.
• Critical Examination: Committee members rigorously question the candidate, challenging assumptions, testing methodologies, and probing the boundaries of the research.
• Validation of Originality: The defence validates the originality and contribution of the candidate’s work to the existing body of knowledge.

The PhD defence often takes the form of an oral examination, commonly referred to as the viva voce. This oral component adds a dynamic and interactive dimension to the evaluation process. Key elements of the oral examination include:

• Presentation: The candidate typically begins with a formal presentation, summarizing the dissertation’s main components, methodology, and findings. This presentation is an opportunity to showcase the significance and novelty of the research.
• Questioning and Discussion: Following the presentation, the candidate engages in a thorough questioning session with the examination committee. Committee members explore various aspects of the research, challenging the candidates to articulate their rationale, defend their conclusions, and respond to critiques.
• Defence of Methodology: The candidate is often required to defend the chosen research methodology, demonstrating its appropriateness, rigour, and contribution to the field.
• Evaluation of Contributions: Committee members assess the originality and impact of the candidate’s contributions to the academic discipline, seeking to understand how the research advances existing knowledge.

The oral examination is not a mere formality; it is a dynamic exchange that tests the candidate’s intellectual acumen, research skills, and capacity to contribute meaningfully to the scholarly community.

In essence, the PhD defence is a comprehensive and interactive evaluation that encapsulates the essence of a candidate’s research journey, demanding a synthesis of knowledge, clarity of expression, and the ability to navigate the complexities of academic inquiry. As we delve into the specifics of the defence process, we will unravel the layers of preparation and skill required to navigate this transformative academic milestone.

How Long is a PhD Defence?

The duration of a PhD defence can vary widely, but it typically ranges from two to three hours. This time frame encompasses the candidate’s presentation of their research, questioning and discussions with the examination committee, and any additional deliberations or decisions by the committee. However, it’s essential to note that this is a general guideline, and actual defence durations may vary based on numerous factors.

• Sciences and Engineering: Defenses in these fields might lean towards the shorter end of the spectrum, often around two hours. The focus is often on the methodology, results, and technical aspects.
• Humanities and Social Sciences: Given the theoretical and interpretive nature of research in these fields, defences might extend closer to three hours or more. Discussions may delve into philosophical underpinnings and nuanced interpretations.
• Simple vs. Complex Studies: The complexity of the research itself plays a role. Elaborate experiments, extensive datasets, or intricate theoretical frameworks may necessitate a more extended defence.
• Number of Committee Members: A larger committee or one with diverse expertise may lead to more extensive discussions and varied perspectives, potentially elongating the defence.
• Committee Engagement: The level of engagement and probing by committee members can influence the overall duration. In-depth discussions or debates may extend the defence time.
• Cultural Norms: In some countries, the oral defence might be more ceremonial, with less emphasis on intense questioning. In others, a rigorous and extended defence might be the norm.
• Evaluation Practices: Different academic systems have varying evaluation criteria, which can impact the duration of the defence.
• Institutional Guidelines: Some institutions may have specific guidelines on defence durations, influencing the overall time allotted for the process.

Candidates should be well-prepared for a defence of any duration. Adequate preparation not only involves a concise presentation of the research but also anticipates potential questions and engages in thoughtful discussions. Additionally, candidates should be flexible and responsive to the dynamics of the defense, adapting to the pace set by the committee.

Success Factors in a PhD Defence

• Successful defence begins with a deep and comprehensive understanding of the research. Candidates should be well-versed in every aspect of their study, from the theoretical framework to the methodology and findings.
• Thorough preparation involves anticipating potential questions from the examination committee. Candidates should consider the strengths and limitations of their research and be ready to address queries related to methodology, data analysis, and theoretical underpinnings.
• Conducting mock defences with peers or mentors can be invaluable. It helps refine the presentation, exposes potential areas of weakness, and provides an opportunity to practice responding to challenging questions.
• Actively listen to questions without interruption. Understanding the nuances of each question is crucial for providing precise and relevant responses.
• Responses should be clear, concise, and directly address the question. Avoid unnecessary jargon, and strive to convey complex concepts in a manner that is accessible to the entire committee.
• It’s acceptable not to have all the answers. If faced with a question that stumps you, acknowledge it honestly. Expressing a willingness to explore the topic further demonstrates intellectual humility.
• Use questions as opportunities to reinforce key messages from the research. Skillfully link responses back to the core contributions of the study, emphasizing its significance.
• Rehearse the presentation multiple times to build familiarity with the material. This enhances confidence, reduces nervousness, and ensures a smooth and engaging delivery.
• Maintain confident and open body language. Stand tall, make eye contact, and use gestures judiciously. A composed demeanour contributes to a positive impression.
• Acknowledge and manage nervousness. It’s natural to feel some anxiety, but channelling that energy into enthusiasm for presenting your research can turn nervousness into a positive force.
• Engage with the committee through a dynamic and interactive presentation. Invite questions during the presentation to create a more conversational atmosphere.
• Utilize visual aids effectively. Slides or other visual elements should complement the spoken presentation, reinforcing key points without overwhelming the audience.
• View the defence not only as an evaluation but also as an opportunity for continuous improvement. Feedback received during the defence can inform future research endeavours and scholarly pursuits.

In essence, success in a PhD defence hinges on meticulous preparation, adept handling of questions, and projecting confidence and composure during the presentation. A well-prepared and resilient candidate is better positioned to navigate the challenges of the defence, transforming it from a moment of evaluation into an affirmation of scholarly achievement.

Failure in PhD Defence

• While the prospect of failing a PhD defence is relatively rare, it’s essential for candidates to acknowledge that the possibility exists. Understanding this reality can motivate diligent preparation and a proactive approach to mitigate potential risks.
• Failure, if it occurs, should be seen as a learning opportunity rather than a definitive endpoint. It may highlight areas for improvement and offer insights into refining the research and presentation.
• Lack of thorough preparation, including a weak grasp of the research content, inadequate rehearsal, and failure to anticipate potential questions, can contribute to failure.
• Inability to effectively defend the chosen research methodology, including justifying its appropriateness and demonstrating its rigour, can be a critical factor.
• Failing to clearly articulate the original contributions of the research and its significance to the field may lead to a negative assessment.
• Responding defensively to questions, exhibiting a lack of openness to critique, or being unwilling to acknowledge limitations can impact the overall impression.
• Inability to address committee concerns or incorporate constructive feedback received during the defense may contribute to a negative outcome.
• Comprehensive preparation is the cornerstone of success. Candidates should dedicate ample time to understanding every facet of their research, conducting mock defences, and seeking feedback.
• Identify potential weaknesses in the research and address them proactively. Being aware of limitations and articulating plans for addressing them in future work demonstrates foresight.
• Engage with mentors, peers, or advisors before the defence. Solicit constructive feedback on both the content and delivery of the presentation to refine and strengthen the defence.
• Develop strategies to manage stress and nervousness. Techniques such as mindfulness, deep breathing, or visualization can be effective in maintaining composure during the defence.
• Conduct a pre-defense review of all materials, ensuring that the presentation aligns with the dissertation and that visual aids are clear and supportive.
• Approach the defence with an open and reflective attitude. Embrace critique as an opportunity for improvement rather than as a personal affront.
• Clarify expectations with the examination committee beforehand. Understanding the committee’s focus areas and preferences can guide preparation efforts.
• In the event of failure, candidates should approach the situation with resilience. Seek feedback from the committee, understand the reasons for the outcome, and use the experience as a springboard for improvement.

In summary, while the prospect of failing a PhD defence is uncommon, acknowledging its possibility and taking proactive steps to mitigate risks are crucial elements of a well-rounded defence strategy. By addressing common failure factors through thorough preparation, openness to critique, and a resilient attitude, candidates can increase their chances of a successful defence outcome.

PhD Defense or Defence?

• The choice between “defense” and “defence” is primarily a matter of British English versus American English spelling conventions. “Defense” is the preferred spelling in American English, while “defence” is the British English spelling.
• In the global academic community, both spellings are generally understood and accepted. However, the choice of spelling may be influenced by the academic institution’s language conventions or the preferences of individual scholars.
• Academic institutions may have specific guidelines regarding language conventions, and candidates are often expected to adhere to the institution’s preferred spelling.
• Candidates may also consider the preferences of their advisors or committee members. If there is a consistent spelling convention used within the academic department, it is advisable to align with those preferences.
• Consideration should be given to the spelling conventions of scholarly journals in the candidate’s field. If intending to publish research stemming from the dissertation, aligning with the conventions of target journals is prudent.
• If the defense presentation or dissertation will be shared with an international audience, using a more universally recognized spelling (such as “defense”) may be preferred to ensure clarity and accessibility.
• Regardless of the chosen spelling, it’s crucial to maintain consistency throughout the document. Mixing spellings can distract from the content and may be perceived as an oversight.
• In oral presentations and written correspondence related to the defence, including emails, it’s advisable to maintain consistency with the chosen spelling to present a professional and polished image.
• Recognizing that language conventions can vary, candidates should approach the choice of spelling with flexibility. Being adaptable to the preferences of the academic context and demonstrating an awareness of regional variations reflects a nuanced understanding of language usage.
• With the increasing globalization of academia, an awareness of language variations becomes essential. Scholars often collaborate across borders, and an inclusive approach to language conventions contributes to effective communication and collaboration.

In summary, the choice between “PhD defense” and “PhD defence” boils down to regional language conventions and institutional preferences. Maintaining consistency, being mindful of the target audience, and adapting to the expectations of the academic community contribute to a polished and professional presentation, whether in written documents or oral defences.

Is PhD Defense a Formality?

• While the PhD defence is a structured and ritualistic event, it is far from being a mere formality. It is a critical and substantive part of the doctoral journey, designed to rigorously evaluate the candidate’s research contributions, understanding of the field, and ability to engage in scholarly discourse.
• The defence is not a checkbox to be marked but rather a dynamic process where the candidate’s research is evaluated for its scholarly merit. The committee scrutinizes the originality, significance, and methodology of the research, aiming to ensure it meets the standards of advanced academic work.
• Far from a passive or purely ceremonial event, the defence involves active engagement between the candidate and the examination committee. Questions, discussions, and debates are integral components that enrich the scholarly exchange during the defence.
• The defence serves as a platform for the candidate to demonstrate the originality of their research. Committee members assess the novelty of the contributions, ensuring that the work adds value to the existing body of knowledge.
• Beyond the content, the defence evaluates the methodological rigour of the research. Committee members assess whether the chosen methodology is appropriate, well-executed, and contributes to the validity of the findings.
• Successful completion of the defence affirms the candidate’s ability to contribute meaningfully to the academic discourse in their field. It is an endorsement of the candidate’s position as a knowledgeable and respected scholar.
• The defence process acts as a quality assurance mechanism in academia. It ensures that individuals awarded a doctoral degree have undergone a thorough and rigorous evaluation, upholding the standards of excellence in research and scholarly inquiry.
• Institutions have specific criteria and standards for awarding a PhD. The defence process aligns with these institutional and academic standards, providing a consistent and transparent mechanism for evaluating candidates.
• Successful completion of the defence is a pivotal moment that marks the transition from a doctoral candidate to a recognized scholar. It opens doors to further contributions, collaborations, and opportunities within the academic community.
• Research presented during the defence often forms the basis for future publications. The validation received in the defence enhances the credibility of the research, facilitating its dissemination and impact within the academic community.
• Beyond the academic realm, a successfully defended PhD is a key credential for professional advancement. It enhances one’s standing in the broader professional landscape, opening doors to research positions, teaching opportunities, and leadership roles.

In essence, the PhD defence is a rigorous and meaningful process that goes beyond formalities, playing a crucial role in affirming the academic merit of a candidate’s research and marking the culmination of their journey toward scholarly recognition.

Dressing for Success: PhD Defense Outfit

• For Men: A well-fitted suit in neutral colours (black, navy, grey), a collared dress shirt, a tie, and formal dress shoes.
• For Women: A tailored suit, a blouse or button-down shirt, and closed-toe dress shoes.
• Dress codes can vary based on cultural expectations. It’s advisable to be aware of any cultural nuances within the academic institution and to adapt attire accordingly.
• With the rise of virtual defenses, considerations for attire remain relevant. Even in online settings, dressing professionally contributes to a polished and serious demeanor. Virtual attire can mirror what one would wear in-person, focusing on the upper body visible on camera.
• The attire chosen for a PhD defense contributes to the first impression that a candidate makes on the examination committee. A professional and polished appearance sets a positive tone for the defense.
• Dressing appropriately reflects respect for the gravity of the occasion. It acknowledges the significance of the defense as a formal evaluation of one’s scholarly contributions.
• Wearing professional attire can contribute to a boost in confidence. When individuals feel well-dressed and put-together, it can positively impact their mindset and overall presentation.
• The PhD defense is a serious academic event, and dressing professionally fosters an atmosphere of seriousness and commitment to the scholarly process. It aligns with the respect one accords to academic traditions.
• Institutional norms may influence dress expectations. Some academic institutions may have specific guidelines regarding attire for formal events, and candidates should be aware of and adhere to these norms.
• While adhering to the formality expected in academic settings, individuals can also express their personal style within the bounds of professionalism. It’s about finding a balance between institutional expectations and personal comfort.
• Select and prepare the outfit well in advance to avoid last-minute stress. Ensure that the attire is clean, well-ironed, and in good condition.
• Accessories such as ties, scarves, or jewelry should complement the outfit. However, it’s advisable to keep accessories subtle to maintain a professional appearance.
• While dressing professionally, prioritize comfort. PhD defenses can be mentally demanding, and comfortable attire can contribute to a more confident and composed demeanor.
• Pay attention to grooming, including personal hygiene and haircare. A well-groomed appearance contributes to an overall polished look.
• Start preparation well in advance of the defense date. Know your research inside out, anticipate potential questions, and be ready to discuss the nuances of your methodology, findings, and contributions.
• Conduct mock defenses with peers, mentors, or colleagues. Mock defenses provide an opportunity to receive constructive feedback, practice responses to potential questions, and refine your presentation.
• Strike a balance between confidence and humility. Confidence in presenting your research is essential, but being open to acknowledging limitations and areas for improvement demonstrates intellectual honesty.
• Actively engage with the examination committee during the defense. Listen carefully to questions, respond thoughtfully, and view the defense as a scholarly exchange rather than a mere formality.
• Understand the expertise and backgrounds of the committee members. Tailor your presentation and responses to align with the interests and expectations of your specific audience.
• Practice time management during your presentation. Ensure that you allocate sufficient time to cover key aspects of your research, leaving ample time for questions and discussions.
• It’s normal to feel nervous, but practicing mindfulness and staying calm under pressure is crucial. Take deep breaths, maintain eye contact, and focus on delivering a clear and composed presentation.
• Have a plan for post-defense activities. Whether it’s revisions to the dissertation, publications, or future research endeavors, having a roadmap for what comes next demonstrates foresight and commitment to ongoing scholarly contributions.
• After successfully defending, individuals often emphasize the importance of taking time to reflect on the entire doctoral journey. Acknowledge personal and academic growth, celebrate achievements, and use the experience to inform future scholarly pursuits.

In summary, learning from the experiences of others who have successfully defended offers a wealth of practical wisdom. These insights, combined with thoughtful preparation and a proactive approach, contribute to a successful and fulfilling defense experience.

You have plenty of career options after completing a PhD. For more details, visit my blog posts:

7 Essential Steps for Building a Robust Research Portfolio

Exciting Career Opportunities for PhD Researchers and Research Scholars

Freelance Writing or Editing Opportunities for Researchers A Comprehensive Guide

Research Consultancy: An Alternate Career for Researchers

The Insider’s Guide to Becoming a Patent Agent: Opportunities, Requirements, and Challenges

The journey from a curious researcher to a recognized scholar culminates in the PhD defence—an intellectual odyssey marked by dedication, resilience, and a relentless pursuit of knowledge. As we navigate the intricacies of this pivotal event, it becomes evident that the PhD defence is far more than a ceremonial rite; it is a substantive evaluation that validates the contributions of a researcher to the academic landscape.

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Tips for preparing your PhD defense [EASY dissertation defense]

Embarking on the final hurdle of your doctoral journey, the PhD dissertation defense, can feel daunting.

This significant event involves presenting and justifying years of research to a committee of field experts, showcasing your comprehension, originality, and critical thinking skills.

With various expectations from committee members, it’s crucial to know what makes a compelling thesis and how to adeptly defend your arguments. Preparation is key; from choosing well-suited examiners to meticulously preparing for potential questions, every step counts.

This article provides easy-to-follow tips for this process, from how to approach revisions to the actual defense duration, ensuring a smoother dissertation defense.

Top tips for your PhD defence process

• Understand Expectations : Understand what your examiners are looking for in your thesis. They expect it to be relevant to the field, have a clear title, a comprehensive abstract, engage with relevant literature, answer clear research questions, provide a consistent argument, and make a significant contribution to knowledge. They also value the ability to show connections between different parts of the thesis and a confident, positive attitude during the defense.
• Choose the Right Examiners : Make strategic decisions when selecting your examiners. They should be experts in your field, open-minded about cross-discipline work, cited in your work, have a constructive approach, align with your methodology, and respect critical viewpoints. Consider your supervisor’s advice, as they can help identify suitable examiners.
• Thorough Preparation : Understand your institute’s specific defense requirements and practice rigorously. Break down your thesis into sections, time your presentation, focus on key points, and prepare for potential questions. Consider setting up a mock defense to familiarize yourself with the process.
• Master Your Content : Understand your work inside out. Rather than cramming as much information as possible, focus on thoroughly comprehending your research. If faced with an unexpected question during the defense, take a moment to formulate an organized response.
• Manage Your Time : Be aware that dissertation defenses usually last between one to three hours, so ensure your presentation fits within this timeframe. Remember, the defense is an opportunity to showcase your hard work. Be confident and composed throughout the process.

What Is Dissertation Defense?

A PhD defense, also known as a viva , is a critical process that marks the completion of a doctoral degree. It varies from one institution to another and between different countries.

It could be a private examination by a panel of experts in the field or a public defense before an audience. 

In this defense, you present and justify the research you have conducted over many years.

You’ll engage in a rigorous academic conversation about the different aspects of your research, answer questions, and explain your findings and their implications. 

The defense is a chance for the panel to test your comprehension of your chosen subject area, your work’s originality, and its contribution to the field. It also tests your ability to think critically, to articulate your thoughts, and how effectively you can defend your arguments under pressure.

The essence of a PhD defense is not only to assess the validity of the thesis but also to assess the candidate’s proficiency in their subject.

What Are the Expectations of PhD Defence Examiners? Understand your dissertation committee.

Meeting the expectations of committee members in the context of a dissertation is essential for the successful completion of the research.

They will have read your thesis and will be looking for any mistakes or areas that they are unsure about to ask you during your PhD defence.

Here are what PhD defence examiners are looking for in your thesis and may have questions at your oral defence:

A dissertation committee typically consists of external experts (in a similar field) who will engage in robust discussion about your PhD and submitted thesis.  

As committee members, their primary role is to actively engage with the dissertation research, offering constructive feedback and suggestions as well as deciding if you have satisfied the requirements of the university to be awarded a PhD

Here’s my video about the common questions you’ll likely encounter during your defence and how you can answer them:

How to Choose your PhD examiners and committee members

Choosing your PhD examiners requires strategic thinking and insightful conversations with your supervisor. It’s a very important decision and can make your PhD defence much smoother. 

During my PhD, I chose examiners that I had cited and based my work on their preliminary investigations. 

But there are more things to think about before you write down their names!

Here’s a table checklist for choosing your PhD examiners.

First, compile a list of potential examiners who you believe would be appropriate for reviewing your thesis. Discuss your choices with your supervisor, explaining why you consider them suitable. 

If your thesis spans multiple disciplines, consider choosing examiners from each discipline; it ensures intricate knowledge of each field is utilized.

However, ensure these examiners are open-minded about cross-discipline work, as disciplines tend to have unique ways of presenting their findings.

Listen to your supervisor’s advice.

They have experience in these matters and know who would be best qualified to examine your work.

Even if a scholar is high-profile or an editor of a favored journal, they might not be suitable due to methodological differences or varying research approaches. 

Choosing the right examiner is crucial, as an ill-suited examiner could result in undesired outcomes. The goal is to establish a thoughtful academic conversation about your work.

How to Prepare for Dissertation Defense?

To prepare for your dissertation defense, start by understanding the specific requirements of your institute, as the process can vary across countries.

This could include:

• a presentation,
• a conversation with examiners,
• or a combination of both.

Once you know what to expect, practice vigorously. This should not be your first time discussing your work with others – engage in academic conversation, seek feedback and address challenging questions prior to the defense.

Breakdown your thesis into sections and time yourself on each section to manage length. Focus on the key points and avoid irrelevant details.

Creating a mock defense will be helpful in managing time and getting familiar with the process.

Prepare for potential questions. It’s not about cramming as much information as possible, but about understanding your work inside out. Start by preparing answers to common defense questions. In case of an unexpected question, don’t rush to answer. Take a moment, write down key points, and formulate an organized response.

Remember that the defense is an opportunity to showcase years of hard work.

Be confident, and don’t forget to breathe!

How Long Do Dissertation Defenses Usually Last?

 The length of a dissertation defense can vary depending on factors such as the specific requirements of the institution and the complexity of the research being presented.

On average, a dissertation defense usually lasts between one to three hours.

During this time, the candidate will present their research and findings to a panel of experts, often including faculty members and fellow researchers.

The defense typically begins with an introduction by the candidate, followed by a detailed presentation of the research methodology, results, and conclusions.

Panel members then have the opportunity to ask questions and engage in a discussion with the candidate.

It is not unusual for defenses to be quite intense and challenging, as the panel seeks to assess the depth of the candidate’s knowledge and understanding of their research. In some cases, the candidate may be asked to leave the room while the panel deliberates before ultimately reaching a decision on the acceptance or rejection of the dissertation. 

Wrapping up

As the culmination of the doctoral journey, the PhD defense demands meticulous preparation and understanding of its unique rigors.

This entails knowing the expectations of your dissertation committee, choosing the right examiners who offer constructive feedback, and putting considerable time into preparing for your oral defense.

The defense process isn’t a mere formality; it’s a critical examination of the candidate’s comprehension, originality, and critical thinking skills.

It provides an opportunity to exhibit your research and its contribution to your field, defend your arguments, and validate your years of labor.

Thus, selecting well-qualified examiners, anticipating potential questions, and honing your presentation skills are vital for a successful defense.

Students must be registered for their PhD program and finalize their dissertation prior to the defense, which can last anywhere from one to three hours, depending on the institution and the complexity of the research.

Any corrections or major revisions suggested by the dissertation committee members must be completed and submitted weeks prior to the conferral date.

A PhD defense isn’t just a rite of passage for doctoral candidates—it’s the final, decisive step on the journey to earning a doctorate.

It requires the full commitment of the candidate, their dissertation advisor, the committee chair, and all members involved, ensuring that the graduate studies department’s requirements are met, and that the student is admitted to the next phase of their academic or professional journey.

Dr Andrew Stapleton has a Masters and PhD in Chemistry from the UK and Australia. He has many years of research experience and has worked as a Postdoctoral Fellow and Associate at a number of Universities. Although having secured funding for his own research, he left academia to help others with his YouTube channel all about the inner workings of academia and how to make it work for you.

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Erin Zimmerman

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The Last Big Hurdle: How to Prepare for a Successful PhD Defence

It’s the moment almost everyone who completes a PhD both dreads and looks ahead to for years—the defence. It signals a major achievement, but in people’s imaginations, it can seem like the stuff of nightmares… standing frozen in front of everyone, unable to answer a tricky question posed by a committee member and feeling like you must look incompetent. The format of a doctoral defence varies from field to field, but the worst fears of the candidates remain largely the same. Though most people know it probably won’t go so badly, the open-ended-ness can certainly be intimidating- you’re up there alone in front of a panel of experts who get to ask you whatever they’d like, and you may have to deliver your answers in front of an audience of your peers. There are few experiences in academic life more geared to be stressful for the person at the centre of them.

It doesn’t have to be that bad. I spent the weeks leading up to my PhD defence in a state of near panic, but I can honestly say that once it actually got underway, I sort of enjoyed it. You’re the star of the show and get to walk your peers through the finer points of your research. It can be a really invigorating experience. So let’s try to break this down into bite-sized chunks and look at strategies and tips for making your defence an event you might actually look back fondly on.

What the committee wants

Let’s start with what the committee is actually looking for. They want to see a firm grasp of the subject matter, an understanding of the implications of the work, and the ability to see weaknesses in the methodology and possible routes to take for future work. This means creating a presentation that gives a clear, logical overview of your topic, the question you’re addressing, what you did, your results and conclusions, and where the research can go from here. Remember, your jury members are not out to get you. The questions you receive from them will generally fall under one of three headings- those that test your subject knowledge, those that clarify a confusing point, and those that arise from genuine curiosity. If your presentation does a good job of conveying your knowledge of your topic, you can expect more questions from the second and third categories, allowing you to think of the defense more as a conversation amongst experts than a test from on high.

How to prepare

Practice is obviously very important here. Once you’ve put your talk together, find a trusted friend or mentor (ideally, several of them) who knows your field to go through it with you. They can both help you to pare down unnecessary parts and point out logical leaps you may not have noticed because you’re so close to the subject matter. You also want this to be a person who will ask you tough questions and try to spot holes in your reasoning, so choose your test audience carefully. It can be tempting to spend a lot of time obsessing over your slides, trying to make them perfect, but there’s a lot of studying you’ll need to do to be ready for more tangential questions, so don’t lose too much time this way.

Even though you have lived and breathed your thesis topic for years, it’s a good idea to give your thesis a complete re-read just to make sure you really know what’s in there. It may have been months since you finished writing it, and parts may have gotten a little fuzzy since then. Make sure you know why you used the methodology that you did, be able to justify any conclusions you’ve made, and if there are mistakes, admit them openly at the defence and be able to talk about what you should have done differently—the committee isn’t looking for perfection, they’re looking for clear thinking and thorough consideration of methodology.

This is also a good time to review important topics that are peripheral to your work; this will allow you to answer some of the questions designed to test the limits of your broader knowledge of your field. One of the best pieces of defence preparation advice I’ve ever heard is to find out what each of your committee members’ professional interests are, and do a bit of reading on those topics. There’s a very good chance that they’ll ask you something that’s related to their own work, because that’s familiar ground to them, and you may be able to anticipate these questions this way.

Finally, though it’s less and less of a problem as technology improves, you’ll want to make very sure ahead of time that all your presentation gear works and connects properly to the display equipment in the room where your defence will be. No one wants to be running around at the last moment looking for a dongle they didn’t think they needed, or have their laptop’s battery run out partway through the defence. Check that your slides look the same way on the projection screen as they do on your computer- not cut off or too dark. It also doesn’t hurt just to spend time in the room in which you’ll be presenting, to get a feel for the place and see where everything will be positioned.

Common questions and ideas to think about

• What makes your project original, and how does it answer a previously unanswered question? What have you contributed to the body of knowledge on this topic?
• Why was this question important to ask? Why do we care about what your findings reveal? (Hint: “Just for the sake of knowing” is not an acceptable answer here.)
• Did the focus of your project change over its course? If so, explain how and why.

Methodology

• Why did you choose your methodological approach (including your statistical analyses)? Why is it superior to or more appropriate than all other methodologies?
• Talk about the difficulties you experienced with your methodology and how you addressed them.
• What are the limitations of your study design/methodology?
• Explain how your data represent an appropriate source of measurement to address your question.
• Is the amount of data gathered sufficient to address your question? Why or why not?
• If you could do it again with unlimited time and funds, how would your methodology change?

Conclusions

• What would you say is the most important “take-away” message of your work?
• Does your work have wider implications for other disciplines in your field?
• How do your conclusions support or contradict the existing literature?
• Are there alternative ways your data could have been interpreted?
• Speculate about what broader implications your research could have, but which aren’t addressed by your data, or were outside the scope of your project.
• If you were to continue on with this area of research, what would you do next to further your results? Is there a closely related “spin-off” question that needs to be answered?
• Propose an experimental design to test this related question. What results might you expect to see?
• Where do you think this field of study is headed in the next five to ten years?

Tips, tricks, and stress management

• Practice the first few minutes of your talk until you can do it on ‘autopilot’; this will give you a bit of time to relax into your presentation, get your thoughts in order, and begin talking more confidently.
• If your defence is open to the public, ask a few supportive friends or colleagues to sit where you can easily make eye contact while you’re talking. Seeing a friendly, smiling face can be encouraging and help you to relax.
• Don’t forget to review the newest literature in the weeks leading up to your defence—one or more important papers may have been published in your field since you wrote your thesis, and you’ll want to know about them.
• Have a hard copy of your thesis on hand during the defence. It’s much faster to flip to a physical page when asked about a particular section of the text. If this really isn’t for you, be sure you have a quick way to move through pages on your computer.
• Eat and drink the same things you normally would on the day of your defence. Your stomach may be extra sensitive in response to the stress, and you don’t want to surprise it with anything new. And go easy on the caffeine… jittery-ness will not help you to manage your stress!
• Try to let your enthusiasm for your subject matter show; your audience will feel more positive about your talk if they can see that you really find the work fascinating.
• It’s fine to take a moment to think about your answer before responding. The silence isn’t as long or as deafening as you think it is. And if you don’t know, just admit you don’t know—it’s okay to not know everything.
• Dress well, but comfortably, and try to project confidence. If you can speak to your committee as a group of your peers, it will reflect well on your growth as a scientist in training- and demonstrate you are someone who deserves to be awarded their doctorate.
• Don’t forget to publicly thank your advisor, your committee, and any other key people involved with your project for their time commitment and investment in your career.
• When planning post-defence festivities, be aware that you may be more tired, both mentally and emotionally, than you expected. Don’t ask too much of yourself in the hours following the event.

A bit of encouragement

Above all, there are two things you need to remember while preparing for your defence. First, your advisor and committee would not have allowed you to proceed to this point if they didn’t think you were ready. They want to see you succeed and, altruism aside, it would reflect badly on them as well if you were to fail. Trust that they’ve made the right decision. Second, after years of delving into your little corner of the scientific world, no one knows your thesis topic better than you do—not even your committee. Marshall your facts and feel confident in knowing that on this topic, you’re the world expert.

What is your best advice to prep for a PhD defence?

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Defending Your Dissertation: A Guide

Written by Luke Wink-Moran | Photo by insta_photos

Dissertation defenses are daunting, and no wonder; it’s not a “dissertation discussion,” or a “dissertation dialogue.” The name alone implies that the dissertation you’ve spent the last x number of years working on is subject to attack. And if you don’t feel trepidation for semantic reasons, you might be nervous because you don’t know what to expect. Our imaginations are great at making The Unknown scarier than reality. The good news is that you’ll find in this newsletter article experts who can shed light on what dissertations defenses are really like, and what you can do to prepare for them.

The first thing you should know is that your defense has already begun. It started the minute you began working on your dissertation— maybe even in some of the classes you took beforehand that helped you formulate your ideas. This, according to Dr. Celeste Atkins, is why it’s so important to identify a good mentor early in graduate school.

“To me,” noted Dr. Atkins, who wrote her dissertation on how sociology faculty from traditionally marginalized backgrounds teach about privilege and inequality, “the most important part of the doctoral journey was finding an advisor who understood and supported what I wanted from my education and who was willing to challenge me and push me, while not delaying me.  I would encourage future PhDs to really take the time to get to know the faculty before choosing an advisor and to make sure that the members of their committee work well together.”

Your advisor will be the one who helps you refine arguments and strengthen your work so that by the time it reaches your dissertation committee, it’s ready. Next comes the writing process, which many students have said was the hardest part of their PhD. I’ve included this section on the writing process because this is where you’ll create all the material you’ll present during your defense, so it’s important to navigate it successfully. The writing process is intellectually grueling, it eats time and energy, and it’s where many students find themselves paddling frantically to avoid languishing in the “All-But-Dissertation” doldrums. The writing process is also likely to encroach on other parts of your life. For instance, Dr. Cynthia Trejo wrote her dissertation on college preparation for Latin American students while caring for a twelve-year-old, two adult children, and her aging parents—in the middle of a pandemic. When I asked Dr. Trejo how she did this, she replied:

“I don’t take the privilege of education for granted. My son knew I got up at 4:00 a.m. every morning, even on weekends, even on holidays; and it’s a blessing that he’s seen that work ethic and that dedication and the end result.”

Importantly, Dr. Trejo also exercised regularly and joined several online writing groups at UArizona. She mobilized her support network— her partner, parents, and even friends from high school to help care for her son.

The challenges you face during the writing process can vary by discipline. Jessika Iwanski is an MD/PhD student who in 2022 defended her dissertation on genetic mutations in sarcomeric proteins that lead to severe, neonatal dilated cardiomyopathy. She described her writing experience as “an intricate process of balancing many things at once with a deadline (defense day) that seems to be creeping up faster and faster— finishing up experiments, drafting the dissertation, preparing your presentation, filling out all the necessary documents for your defense and also, for MD/PhD students, beginning to reintegrate into the clinical world (reviewing your clinical knowledge and skill sets)!”

But no matter what your unique challenges are, writing a dissertation can take a toll on your mental health. Almost every student I spoke with said they saw a therapist and found their sessions enormously helpful. They also looked to the people in their lives for support. Dr. Betsy Labiner, who wrote her dissertation on Interiority, Truth, and Violence in Early Modern Drama, recommended, “Keep your loved ones close! This is so hard – the dissertation lends itself to isolation, especially in the final stages. Plus, a huge number of your family and friends simply won’t understand what you’re going through. But they love you and want to help and are great for getting you out of your head and into a space where you can enjoy life even when you feel like your dissertation is a flaming heap of trash.”

While you might sometimes feel like your dissertation is a flaming heap of trash, remember: a) no it’s not, you brilliant scholar, and b) the best dissertations aren’t necessarily perfect dissertations. According to Dr. Trejo, “The best dissertation is a done dissertation.” So don’t get hung up on perfecting every detail of your work. Think of your dissertation as a long-form assignment that you need to finish in order to move onto the next stage of your career. Many students continue revising after graduation and submit their work for publication or other professional objectives.

When you do finish writing your dissertation, it’s time to schedule your defense and invite friends and family to the part of the exam that’s open to the public. When that moment comes, how do you prepare to present your work and field questions about it?

“I reread my dissertation in full in one sitting,” said Dr. Labiner. “During all my time writing it, I’d never read more than one complete chapter at a time! It was a huge confidence boost to read my work in full and realize that I had produced a compelling, engaging, original argument.”

There are many other ways to prepare: create presentation slides and practice presenting them to friends or alone; think of questions you might be asked and answer them; think about what you want to wear or where you might want to sit (if you’re presenting on Zoom) that might give you a confidence boost. Iwanksi practiced presenting with her mentor and reviewed current papers to anticipate what questions her committee might ask.  If you want to really get in the zone, you can emulate Dr. Labiner and do a full dress rehearsal on Zoom the day before your defense.

But no matter what you do, you’ll still be nervous:

“I had a sense of the logistics, the timing, and so on, but I didn’t really have clear expectations outside of the structure. It was a sort of nebulous three hours in which I expected to be nauseatingly terrified,” recalled Dr. Labiner.

“I expected it to be terrifying, with lots of difficult questions and constructive criticism/comments given,” agreed Iwanski.

“I expected it to be very scary,” said Dr. Trejo.

“I expected it to be like I was on trial, and I’d have to defend myself and prove I deserved a PhD,” said Dr Atkins.

And, eventually, inexorably, it will be time to present.  

“It was actually very enjoyable” said Iwanski. “It was more of a celebration of years of work put into this project—not only by me but by my mentor, colleagues, lab members and collaborators! I felt very supported by all my committee members and, rather than it being a rapid fire of questions, it was more of a scientific discussion amongst colleagues who are passionate about heart disease and muscle biology.”

“I was anxious right when I logged on to the Zoom call for it,” said Dr. Labiner, “but I was blown away by the number of family and friends that showed up to support me. I had invited a lot of people who I didn’t at all think would come, but every single person I invited was there! Having about 40 guests – many of them joining from different states and several from different countries! – made me feel so loved and celebrated that my nerves were steadied very quickly. It also helped me go into ‘teaching mode’ about my work, so it felt like getting to lead a seminar on my most favorite literature.”

“In reality, my dissertation defense was similar to presenting at an academic conference,” said Dr. Atkins. “I went over my research in a practiced and organized way, and I fielded questions from the audience.

“It was a celebration and an important benchmark for me,” said Dr. Trejo. “It was a pretty happy day. Like the punctuation at the end of your sentence: this sentence is done; this journey is done. You can start the next sentence.”

If you want to learn more about dissertations in your own discipline, don’t hesitate to reach out to graduates from your program and ask them about their experiences. If you’d like to avail yourself of some of the resources that helped students in this article while they wrote and defended their dissertations, check out these links:

The Graduate Writing Lab

https://thinktank.arizona.edu/writing-center/graduate-writing-lab

The Writing Skills Improvement Program

https://wsip.arizona.edu

Campus Health Counseling and Psych Services

https://caps.arizona.edu

https://www.scribbr.com/

Reference management. Clean and simple.

How to prepare an excellent thesis defense

What is a thesis defense?

How long is a thesis defense, what happens at a thesis defense, your presentation, questions from the committee, 6 tips to help you prepare for your thesis defense, 1. anticipate questions and prepare for them, 2. dress for success, 3. ask for help, as needed, 4. have a backup plan, 5. prepare for the possibility that you might not know an answer, 6. de-stress before, during, and after, frequently asked questions about preparing an excellent thesis defense, related articles.

If you're about to complete, or have ever completed a graduate degree, you have most likely come across the term "thesis defense." In many countries, to finish a graduate degree, you have to write a thesis .

A thesis is a large paper, or multi-chapter work, based on a topic relating to your field of study.

Once you hand in your thesis, you will be assigned a date to defend your work. Your thesis defense meeting usually consists of you and a committee of two or more professors working in your program. It may also include other people, like professionals from other colleges or those who are working in your field.

During your thesis defense, you will be asked questions about your work. The main purpose of your thesis defense is for the committee to make sure that you actually understand your field and focus area.

The questions are usually open-ended and require the student to think critically about their work. By the time of your thesis defense, your paper has already been evaluated. The questions asked are not designed so that you actually have to aggressively "defend" your work; often, your thesis defense is more of a formality required so that you can get your degree.

• Check with your department about requirements and timing.
• Re-read your thesis.
• Anticipate questions and prepare for them.
• Create a back-up plan to deal with technology hiccups.
• Plan de-stressing activities both before, and after, your defense.

How long your oral thesis defense is depends largely on the institution and requirements of your degree. It is best to consult your department or institution about this. In general, a thesis defense may take only 20 minutes, but it may also take two hours or more. The length also depends on how much time is allocated to the presentation and questioning part.

Tip: Check with your department or institution as soon as possible to determine the approved length for a thesis defense.

First of all, be aware that a thesis defense varies from country to country. This is just a general overview, but a thesis defense can take many different formats. Some are closed, others are public defenses. Some take place with two committee members, some with more examiners.

The same goes for the length of your thesis defense, as mentioned above. The most important first step for you is to clarify with your department what the structure of your thesis defense will look like. In general, your thesis defense will include:

• your presentation of around 20-30 minutes
• questions from the committee
• questions from the audience (if the defense is public and the department allows it)

You might have to give a presentation, often with Powerpoint, Google slides, or Keynote slides. Make sure to prepare an appropriate amount of slides. A general rule is to use about 10 slides for a 20-minute presentation.

But that also depends on your specific topic and the way you present. The good news is that there will be plenty of time ahead of your thesis defense to prepare your slides and practice your presentation alone and in front of friends or family.

Tip: Practice delivering your thesis presentation in front of family, friends, or colleagues.

You can prepare your slides by using information from your thesis' first chapter (the overview of your thesis) as a framework or outline. Substantive information in your thesis should correspond with your slides.

Make sure your slides are of good quality— both in terms of the integrity of the information and the appearance. If you need more help with how to prepare your presentation slides, both the ASQ Higher Education Brief and James Hayton have good guidelines on the topic.

The committee will ask questions about your work after you finish your presentation. The questions will most likely be about the core content of your thesis, such as what you learned from the study you conducted. They may also ask you to summarize certain findings and to discuss how your work will contribute to the existing body of knowledge.

Tip: Read your entire thesis in preparation of the questions, so you have a refreshed perspective on your work.

While you are preparing, you can create a list of possible questions and try to answer them. You can foresee many of the questions you will get by simply spending some time rereading your thesis.

Here are a few tips on how to prepare for your thesis defense:

You can absolutely prepare for most of the questions you will be asked. Read through your thesis and while you're reading it, create a list of possible questions. In addition, since you will know who will be on the committee, look at the academic expertise of the committee members. In what areas would they most likely be focused?

If possible, sit at other thesis defenses with these committee members to get a feel for how they ask and what they ask. As a graduate student, you should generally be adept at anticipating test questions, so use this advantage to gather as much information as possible before your thesis defense meeting.

Your thesis defense is a formal event, often the entire department or university is invited to participate. It signals a critical rite of passage for graduate students and faculty who have supported them throughout a long and challenging process.

While most universities don't have specific rules on how to dress for that event, do regard it with dignity and respect. This one might be a no-brainer, but know that you should dress as if you were on a job interview or delivering a paper at a conference.

It might help you deal with your stress before your thesis defense to entrust someone with the smaller but important responsibilities of your defense well ahead of schedule. This trusted person could be responsible for:

• preparing the room of the day of defense
• setting up equipment for the presentation
• preparing and distributing handouts

Technology is unpredictable. Life is too. There are no guarantees that your Powerpoint presentation will work at all or look the way it is supposed to on the big screen. We've all been there. Make sure to have a plan B for these situations. Handouts can help when technology fails, and an additional clean shirt can save the day if you have a spill.

One of the scariest aspects of the defense is the possibility of being asked a question you can't answer. While you can prepare for some questions, you can never know exactly what the committee will ask.

There will always be gaps in your knowledge. But your thesis defense is not about being perfect and knowing everything, it's about how you deal with challenging situations. You are not expected to know everything.

James Hayton writes on his blog that examiners will sometimes even ask questions they don't know the answer to, out of curiosity, or because they want to see how you think. While it is ok sometimes to just say "I don't know", he advises to try something like "I don't know, but I would think [...] because of x and y, but you would need to do [...] in order to find out.” This shows that you have the ability to think as an academic.

You will be nervous. But your examiners will expect you to be nervous. Being well prepared can help minimize your stress, but do know that your examiners have seen this many times before and are willing to help, by repeating questions, for example. Dora Farkas at finishyourthesis.com notes that it’s a myth that thesis committees are out to get you.

Two common symptoms of being nervous are talking really fast and nervous laughs. Try to slow yourself down and take a deep breath. Remember what feels like hours to you are just a few seconds in real life.

• Try meditational breathing right before your defense.
• Get plenty of exercise and sleep in the weeks prior to your defense.
• Have your clothes or other items you need ready to go the night before.
• During your defense, allow yourself to process each question before answering.
• Go to dinner with friends and family, or to a fun activity like mini-golf, after your defense.

Allow yourself to process each question, respond to it, and stop talking once you have responded. While a smile can often help dissolve a difficult situation, remember that nervous laughs can be irritating for your audience.

We all make mistakes and your thesis defense will not be perfect. However, careful preparation, mindfulness, and confidence can help you feel less stressful both before, and during, your defense.

Finally, consider planning something fun that you can look forward to after your defense.

It is completely normal to be nervous. Being well prepared can help minimize your stress, but do know that your examiners have seen this many times before and are willing to help, by repeating questions for example if needed. Slow yourself down, and take a deep breath.

Your thesis defense is not about being perfect and knowing everything, it's about how you deal with challenging situations. James Hayton writes on his blog that it is ok sometimes to just say "I don't know", but he advises to try something like "I don't know, but I would think [...] because of x and y, you would need to do [...] in order to find out".

Your Powerpoint presentation can get stuck or not look the way it is supposed to do on the big screen. It can happen and your supervisors know it. In general, handouts can always save the day when technology fails.

• Dress for success.
• Ask for help setting up.
• Have a backup plan (in case technology fails you).
• Deal with your nerves.

The Grad Student Way

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• 10 Ways To Successfully Defend Your PhD

First, what does it take to give a successful PhD Defense? How can you prepare, keep the stress levels low, and make sure you have the highest chance of success?

I’ll just say that everyone’s PhD Defense is unique and is unpredictable. Your talk/presentation is only as good as you want it to be. And you cannot fully prepare for all the endless possibility of questions. If you wrote a 200 page thesis, your thesis commitee can pick apart an error bar on a graph on page 133. They can ask you what you meant by a word in a random sentence in any given paragraph. Keep in mind, this is all just apart of the PhD hazing process, and in a sense is just to humble you. At the end of the day, if you wrote a good quality thesis and are CONFIDENT, you should have no problem successfully defending and leaving that room with a sense of relief. Either way, I wanted to share my experience while it is still fresh in my mind

1) Do not underestimate how long it takes to prepare your slides/talk and make sure you give multiple practice talks

When I turned in my thesis two weeks ahead of time to my committee, I thought the hard part was over. Although a very important milestone, don’t let your guard down. If you already have most your slides ready to go, then you are lucky. I ended up getting data at the last minute and my story changed. I had to make many model slides from scratch.

If you want to give a GOOD thesis talk, you need to practice multiple times . And this means that you don’t cram it all in a couple of days right before your talk. I’m not talking about giving just one practice talk. You need to give multiple group practice talks. In between, you need to practice on your own.

You certainly don’t have to memorize every word of your thesis defense talk, but you should have it well-polished. There is no limit (or requirement) on how many practice talks you should give, but give as many talks as it takes until you feel like you are ready. If you are unsure of the quality of your talk (or being “ready”), tape record yourself or watch a video of yourself to see just how good it is. You might be surprised when you play it back to yourself.

You should also time your talk. I noticed that I tend to talk faster (by about 5 minutes) when giving the actual public talk vs. when I practice on my own. The length of the talk can depend on many departmental factors. My talk was ~45-50 minutes long which also leaves time for questions.

Either way, do not procrastinate on your slides and/or talk until days before. Make sure you use the full two weeks to perfect your slides, polish your talk (and be very concise about your words), and review material you are unsure about.

2) Listen to other thesis defense talks

The best way to mentally prepare for your thesis defense talk is to listen to other thesis defense talks. I actually went and got a few talks on DVD (the good ones that I remembered). If their research is on a similar topic as your own, this would be more ideal-but take what you can get. When you watch the talk, ask yourself what makes it good or bad? Were they enthusiastic and sincere? Did they keep the energy throughout the talk? Were there some rough areas of the talk? When nerves are running high, talks may not go as expected. You can battle this nervousness by showing up well-prepared. If you are, the thesis defense talk is just a formality.

If you cannot obtain any thesis defense talks on video, make sure that you go to actual public thesis defense talks. At least go to one so that you have a good idea of how to TIE the whole story together and give your audience the big picture. Keep in mind that you are giving a talk to a general audience . This means that use of jargon and highly technical terms will only put your audience to sleep. Make sure it is clear and understandable. Simplify it the best that you can and put it in the larger context of your research field. Use cartoons or model slides (if necessary) to give your audience the general, overall picture.

3) Have your friends, labmates, and others drill you with questions

What’s the best way to prepare for unforeseen questions? Have others that are familiar with your work drill you with questions. Chances are that even though these questions may not be the actual questions you will be asked either by the public and/or your thesis committee, it prepares you to think on your feet. It also builds your confidence . And the questions that your labmates or friends ask you may just be the same question you will get asked on your defense day.

4) Re-read over your entire thesis and write out your own list of questions

You may be sick of reading your entire thesis over and over by now, but you need to keep everything fresh in your mind. I actually read over my entire thesis multiple times during my final two weeks and came up with my own list of questions that I thought my committee would ask me. In addition, I also came up with a list of questions that I had of my own (questions that I was unsure of or that I thought were a weakness of mine). If you cannot come up with a list of good questions, then you are not trying hard enough.

Even though my committee didn’t ask me my exact list of questions, the process of  coming up with my own list of questions-then finding the answers to those questions (beyond my thesis)-actually helped me gained a deeper understanding of my project. And it was a confidence booster in disguise.

5) Don’t let distractions get to you

Completing your thesis is a huge milestone. Those last two weeks until defense day can be stressful. Whether you are doing job interviews, applying to other jobs, or you want to “jump the gun” and finally start your post-PhD life, don’t give into temptation. Keep your guard up until your actual defense day. This is key to giving a good talk. You need to go in with the mindset that you will kill your presentation and give a long lasting impression to your audience. I have actually heard that some people who gave great thesis defense talks were offered a position shortly after (i.e. a postdoc).

You are going to want to do all those little tasks that you have been putting off for so long because you have spent X amount of months writing your thesis in solitude and you had no time to do them. Your list could be very long. I can tell you that one of the things on my list was to keep publishing blog articles and keep my blog running. I simply did not have enough time. Prioritize and focus on your defense talk and nothing else . If you are looking for jobs during this time period, I will be writing about this in Part 3 of this series.

6) Get plenty of sleep, keep your diet in check, and take care of yourself

This might be the most difficult thing for anyone. I struggled with this the most while writing my thesis. Skipping meals, late nights, overloading your system with caffeine just to stay awake. You have to fight it the best that you can. A month before my defense talk, I hit the gym 3x a week (for the first time in months). Everyone handles the anxiety of their defense talk differently. I am someone who thinks about it constantly. So it becomes hard to focus on other things, like taking care of yourself.

Once your thesis is turned in to your committee members, during those final two weeks- sleep and a proper diet are KEY. The day of your defense, make sure you are well-rested (don’t stay up all night stressing about it) and eat well. Don’t sell yourself short. By taking care of yourself, you ensure that you have the highest probability for giving a great thesis defense talk and showing your committee members that you are confident about your project.

7) Keep your cool and relax

When your defense day comes, you have to remember that you have put in a lot of HARD WORK to get to this point. You know your topic better than anyone . Because of this, you have no reason to be stressed out.

When your committee pushes you and asks you questions, they again will push you to your limits. You will meet a point where you won’t know the answer. Also, a question could simply be a future direction/experiment that you simply haven’t tested yet. Remember that they are simply trying to test your knowledge and humble you. You don’t have to know all the answers. Therefore, when you are answering questions, keep your cool and relax. Answer the questions the best that you can and you should have no problem passing. And in all honesty, the prelim (or qualifying exam) was much harder than the actual defense…

8) Don’t focus on the after-party until you have actually reached the after-party

Who doesn’t want to spend their final two weeks planning the celebration? Although I did have an after-party, I did not go to great efforts to plan it like a wedding party. As I said in #5, prioritize and focus on your thesis defense talk and nothing else. Plan your after-party while you are on break from your practice talk/preparing for questions/working on slides but do not make it a number one priority. Once you have passed, then you can change your focus. The feeling is indescribable (see #10).

9) Have a good structure

A good thesis talk also has a good introduction before going on to the next idea or slide. It should flow in a logical manner and be smooth. That is why #1 is important, because many people don’t spend enough time in the creation of good powerpoint slides. Your slides and talk have to MATCH up , meaning you can’t have really good slides and a mediocre talk (or vice versa) if you want it to go well.

This is why practice is important, and if you spend enough time on BOTH the talk/slides you will give a very good talk. A lot of times while I was actually practicing my talk, I had to go back and change the order/wording of slides or how I introduced certain slides (the wording) so that the flow would be better.

Be formal in how you word things (i.e. say “our data show that”… vs. “you see here that”…). To give a good introduction, it might be wise to use slides that ask a question in between. This question slide (break) in-between your next idea allows for your general audience to CATCH UP and understand your logic . Why are you doing this experiment? If you just show a bunch of your published data with no introduction (and maybe a title that gives an interpretation/punchline), you will overwhelm and bore your audience.

Many scientists forget that although they are an expert on their topic, what seems easy and understandable to them-does not apply to others outside of their field .

Before you go to your next data slides introduce the idea (based on this data I wanted to ask this question). Then tell them WHY you performed this particular experiment (which is basically in the form of a question). Once your audience understands why, go on to the next slide and give them your interpretation. In other words, don’t just jump to the interpretation . This will keep your audience’s attention and make sure that your thesis defense talk gets a lot of positive feedback and leaves a good impression on your committee members (it really does show).

10) Visualize yourself giving your defense each day and think about how good it will feel when it’s over

This one is pretty self explanatory. I will say that when it is all said and done, it feels like a huge burden has been lifted off your shoulders. It is emotional and you finally feel that all that hard work and time that you put in over the years-was all worth it in the end. Good luck to all those who are preparing for their defense talk in the future! Think about what it will be like to get up in front of a large audience and show everyone how you moved a field forward. This is YOUR moment to show everyone you are an expert in your field. The more you keep this mentality, the better your talk will be. Keep your cool and relax (#7) and everything will be fine.

If you would like to see an example video of a defense talk that illustrates the advice I’ve given, a link to my PhD defense can be found here:  http://bit.ly/1sAIT7O

Best of luck to all!

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• PhD Viva Voces – A Complete Guide
• Doing a PhD
• A PhD viva involves defending your thesis in an oral examination with at least two examiners.
• The aim of a PhD viva is to confirm that the work is your own , that you have a deep understanding of your project and, overall, that you are a competent researcher .
• There are no standard durations, but they usually range from one to three hours, with most lasting approximately two hours .
• There are six outcomes of a PhD viva: (1) pass without corrections (2) pass subject to minor corrections, (3) pass subject to major corrections, (4) downgrade to MPhil with no amendments, (5) downgrade to MPhil subject to amendments, (6) immediate fail.
• Almost all students who sit their viva pass it, with the most common outcome being ‘(2) – pass subject to minor corrections’.

What Is a PhD Viva?

A viva voce , more commonly referred to as ‘viva’, is an oral examination conducted at the end of your PhD and is essentially the final hurdle on the path to a doctorate. It is the period in which a student’s knowledge and work are evaluated by independent examiners.

In order to assess the student and their work around their research question, a viva sets out to determine:

• you understand the ideas and theories that you have put forward,
• you can answer questions about elements of your work that the examiners have questions about,
• you understand the broader research in your field and how your work contributes to this,
• you are aware of the limitations of your work and understand how it can be developed further,
• your work makes an original contribution, is your own and has not been plagiarised.

Note: A viva is a compulsory procedure for all PhD students, with the only exception being when a PhD is obtained through publication as opposed to the conventional route of study.

Who Will Attend a Viva?

In the UK, at least two examiners must take part in all vivas. Although you could have more than two examiners, most will not in an attempt to facilitate a smoother questioning process.

One of the two examiners will be internal, i.e. from your university, and the other will be external, i.e. from another university. Regardless, both will be knowledgeable in your research field and have read your thesis beforehand.

In addition to your two examiners, two other people may be present. The first is a chairperson. This is an individual who will be responsible for monitoring the interview and for ensuring proper conduct is followed at all times. The need for an external chairperson will vary between universities, as one of the examiners can also take on this role. The second is your supervisor, whose attendance is decided upon by you in agreement with your examiners. If your supervisor attends, they are prohibited from asking questions or from influencing the outcome of the viva.

To avoid any misunderstandings, we have summarised the above in a table:

Note: In some countries, such as in the United States, a viva is known as a ‘PhD defense’ and is performed publicly in front of a panel or board of examiners and an open audience. In these situations, the student presents their work in the form of a lecture and then faces questions from the examiners and audience which almost acts as a critical appraisal.

How Long Does a Viva Last?

Since all universities have different guidelines , and since all PhDs are unique, there are no standard durations. Typically, however, the duration ranges from one to three hours, with most lasting approximately two hours.

Your examiners will also influence the duration of your viva as some will favour a lengthy discussion, while others may not. Usually, your university will consult your examiners in advance and notify you of the likely duration closer to the day of your viva.

What Happens During a Viva?

Regardless of the subject area, all PhD vivas follow the same examination process format as below.

Introductions

You will introduce yourselves to each other, with the internal examiner normally introducing the external examiner. If an external chairperson is present, they too are introduced; otherwise, this role will be assumed by one of the examiners.

Procedure Explained

After the introductions, the appointed chair will explain the viva process. Although it should already be known to everyone, it will be repeated to ensure the viva remains on track during the forthcoming discussion.

Warm-Up Questions

The examiners will then begin the questioning process. This usually starts with a few simple opening questions, such as asking you to summarise your PhD thesis and what motivated you to carry out the research project.

In-Depth Questions

The viva questions will then naturally increase in difficulty as the examiners go further into the details of your thesis. These may include questions such as “What was the most critical decision you made when determining your research methodology ?”, “Do your findings agree with the current published work?” and “How do your findings impact existing theories or literature? ”. In addition to asking open-ended questions, they will also ask specific questions about the methodology, results and analysis on which your thesis is based.

Closing the Viva

Once the examiners are satisfied that they have thoroughly evaluated your knowledge and thesis, they will invite you to ask any questions you may have, and then bring the oral examination to a close.

What Happens After the Viva?

Once your viva has officially ended, your examiners will ask you to leave the room so that they can discuss your performance. Once a mutual agreement has been reached, which can take anywhere from 10 minutes to an hour, you will be invited back inside and informed of your outcome.

PhD Viva Outcomes

There are six possible outcomes to a viva:

• Immediate award of degree: A rare recommendation – congratulations, you are one of the few people who completely satisfied your examiners the first time around. You do not have to do anything further at this point.
• Minor amendments required: The most common recommendation – you obtain a pass on the condition that you make a number of minor amendments to your thesis, such as clarifying certain points and correcting grammatical errors. The time you have to make these changes depends on the number of them, but is usually one to six months.
• Major amendments required: A somewhat uncommon recommendation – you are requested to make major amendments to your thesis, ranging from further research to collecting more data or rewriting entire sections. Again, the time you have to complete this will depend on the number of changes required, but will usually be six months to one year. You will be awarded your degree once your amended thesis has been reviewed and accepted.
• Immediate award of MPhil: An uncommon recommendation – your examiners believe your thesis does not meet the standard for a doctoral degree but meets the standard for an MPhil (Master of Philosophy), a lower Master’s degree.
• Amendments required for MPhil: A rare recommendation – your examiners believe your thesis does not meet the standard for a doctoral degree, but with several amendments will meet the standard for an MPhil.
• Immediate fail: A very rare recommendation – you are given an immediate fail without the ability to resubmit and without entitlement to an MPhil.

Finding a PhD has never been this easy – search for a PhD by keyword, location or academic area of interest.

What Is the Pass Rate for Vivas?

Based on an  analysis of 26,076 PhD students  who took their viva exam between 2006 and 2017, the PhD viva pass rate in the UK is 96%; of those who passed, about 80% were required to make minor amendments to their thesis. The reason for this high pass rate is that supervisors will only put their students forward for a viva once they confidently believe they are ready for it. As a result, most candidates who sit a viva are already well-versed in their PhD topic before they even start preparing for the exam.

How Do I Arrange a Viva?

Your viva will be arranged either by the examiners or by the chairperson. The viva will be arranged at least one to two months after you have submitted your thesis and will arrange a viva date and venue that is suitable for all participants.

Can I Choose My Examiners?

At most universities, you and your supervisor will choose the internal and external examiners yourselves. This is because the examiners must have extensive knowledge of the thesis topic in order to be able to examine you and, as the author of the thesis in question, who else could better determine who they might be than you and your supervisor. The internal examiner is usually quite easy to find given they will be from your institution, but the external examiner may end up being your second or third preference depending on availability.

Can I Take Notes Into a Viva?

A viva is about testing your competence, not your memory. As such, you are allowed to take notes and other supporting material in with you. However, keep in mind that your examiners will not be overly impressed if you constantly have to refer to your notes to answer each question. Because of this, many students prefer to take an annotated copy of their thesis, with important points already highlighted and key chapters marked with post-it notes.

In addition to an annotated copy of a thesis, some students also take:

• a list of questions they would like to ask the examiners,
• notes that were created during their preparation,
• a list of minor corrections they have already identified from their viva prep work.

How Do I Prepare for a PhD Viva?

There are several ways to prepare for a PhD viva, one of the most effective being a mock viva voce examination . This allows you to familiarise yourself with the type of viva questions you will be asked and identify any weak areas you need to improve. They also give you the opportunity to practise without the pressure, giving you more time to think about your answers which will help to make sure that you know your thesis inside out. However, a mock viva exam is just one of many methods available to you – some of the other viva preparation methods can be found on our “ How to Prepare for a PhD Viva ” page.

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How to prepare for your PhD thesis defence

• by James Hayton, PhD
• August 13th, 2021

Need help? Book a free introductory session

The 3 habits that saved my phd, how to design figures for your phd thesis.

What’s the best way to prepare for your PhD thesis defence? The tips below will help you in the final few weeks before the exam, but the real preparation begins as soon as you start your PhD . Talking to people and discussing your work regularly over a long period of time is the best preparation, so don’t let your thesis defence be the first time you get feedback on your work!

Know the format of your PhD thesis defence

The format of a PhD thesis defence varies from country to country. Having studied in the UK, my viva-voce defence was essentially an interview with one internal and one external examiner. In other countries, it’s common to have public examinations with a whole panel of examiners and an audience of colleagues, family and friends. The first and most obvious tip, then, is to make sure you know what the format of your exam will be; whether you will have to prepare a presentation and so on.

Prepare and practice your presentation

If you have to give a presentation, check any time restrictions so you can prepare accordingly. You don’t want to show up with 100 slides for a 15-minute presentation, nor do you want to show up with 3 slides for a 1-hour presentation.

The most important thing to do for any presentation is to practice so that;

• You know the material inside out
• You know how long it takes
• You can refine the presentation

You can practice on your own or with an audience, and you should do both if possible. Practicing on your own and speaking out loud to an empty room may feel silly, but overcoming that discomfort is good preparation for the discomfort of facing an actual audience. Practicing with an audience of peers is then a good way of getting feedback and finding out what questions people ask.

See also: How to design outstanding PowerPoint slides

The dreaded “awkward question”

A common fear is being asked a question you can’t answer. It’s tempting to try to read a ton of literature to prepare for this, but since it’s very difficult to predict what the examiners will ask and it’s impossible to read everything, this approach isn’t always effective or reassuring (it might just make you realise how much you don’t know).

You aren’t expected to know everything. Sometimes, an examiner will ask a question they don’t know the answer to, either out of interest (since you are the expert in your research) or because they want to see how you think. While it is OK, sometimes, to just say “I don’t know”, you could also say something like,

‍ “I don’t know, but I would think that […] because of x and y , but you would need to do […] in order to find out” .

This shows that you have the ability to think as an academic.

Core content

Of course, there is some core content which you will be expected to know well, but this is set by you, not the examiner. To a large extent, the content of the examination is determined by the content in your thesis.

When you choose what to cover in your thesis you are choosing your battleground for the thesis defence. The best strategy, then, is to stick to the material you know best in your writing!

Dealing with nerves in your thesis defence

You will be nervous before your examination. You will almost certainly get an adrenaline rush, which can set your heart racing, give you sweaty palms, make your stomach churn and make you want to go to the toilet 10 times in 20 minutes. This is normal!

The worst part is waiting to start because there isn’t much you can do to use up your nervous energy. But once the defence starts, you can do some things to keep it under control.

One symptom of nerves is to talk really fast and to try to show how much you know and speak in this kind of long stream of consciousness that diverges away from the question until you forget what the actual question was but then you don’t know how to get back to the point and so you just keep talking and that makes you more nervous and how are you going to get off this train of thought…

Try to slow down and give yourself time to breathe. Try to remember the question* and come back to the point. Once you have answered, stop talking!

*If you forget the question, it’s OK to say, “sorry, I got lost in my train of though there, what was the question, again?”

The examiners expect you to be nervous

Remember that the examiners expect you to be nervous, and they will help you through if necessary. It’s OK to ask them to repeat or clarify a question, to pause to think, or to take a sip of water if you need to!

Ultimately…

Success or failure is determined mainly by the content of your thesis. If your research is good, and you actually did the work, it’s unlikely that a nervous performance in your defence will lead to failure. Generally speaking, once your thesis is submitted, there isn’t much you can do to affect the outcome (positively or negatively). Read through your thesis, read up on one or two key points if necessary, practice your presentation, and trust that whatever happens you will be OK.

An easy way to update your literature review

How to write a thesis you can defend easily

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PhD: An uncommon guide to research, writing & PhD life

By james hayton (2015).

PhD: an uncommon guide to research, writing & PhD life is your essential guide to the basic principles every PhD student needs to know.

Applicable to virtually any field of study, it covers everything from finding a research topic, getting to grips with the literature, planning and executing research and coping with the inevitable problems that arise, through to writing, submitting and successfully defending your thesis.

Useful links

About james hayton, phd, latest phd tips, academic writing coaching.

AI-free zone

All the text on this site (and every word of every video script) is written by me, personally, because I enjoy writing. I enjoy the challenges of thinking deeply and finding the right words to express my ideas. I do not advocate for the use of AI in academic research and writing, except for very limited use cases.

Why you shouldn't rely on AI for PhD research and writing

The false promise of AI for PhD research

Defending a PhD thesis like a boss!- an in-depth Guide

A thesis defense is a two-way process of PhD evaluation, a session during which experts ask questions related to the PhD dissertation for awarding a PhD degree.  

Defending a PhD thesis or dissertation is the last station of the PhD. The process of a doctorate is different! Even though prospective candidates don’t need to appear in the written examination, the thesis defense is a must!

It’s a process occurring behind closed doors or openly (sometimes!), under the supervision of subject experts or all, to award someone a prestigious doctor of philosophy degree .

PhD- the Philosophia doctor is a path full of complications and problems. Starting from admission to writing a thesis or viva, a candidate has to achieve every milestone to move forward towards a PhD. 

Broadly, a good graduation or master’s score, completion of the entrance exam, course work, PhD thesis, publication in a peer-reviewed journal, PhD presentation and well-completed PhD research are criteria to appear in the PhD defense. 

If a candidate fails to achieve any of the requirements given above, he or she can’t go-ahead. The PhD is all about research, passion, knowledge on one side whilst depression, lack of confidence, loneliness, frustration on the other side, nonetheless, it is a fun journey. 

Defending a PhD thesis at terminal can relax a doctoral student, although should not be taken for granted. 

The present piece of content is all about defending your PhD thesis, what is it and how to appear. I will also give you some tips that help you to successfully complete it. 

What is a thesis defense? 

The thesis defense is the terminal process of discussing ‘research’ to award the PhD degree. It is also referred to as PhD viva too; however, it is more a discussion session than a viva. 

A prospective student has to appear in the thesis defense along with the PhD thesis, a presentation and all other PhD related documentation. A student also has to carry all the materials and proofs that can be used to convenience a supervisor or expert to award the doctorate. 

The entire process is verbal. Two external subject experts, a guide, and a university VC conducts the process, note that other students can also appear in the PhD defense process too as a guest. 

Universities usually conduct close viva sessions to avoid ‘personal bullying’ during the thesis defense. 

During the process, questions are based on the thesis content, topic and subject of the prospective student’s research. The objective of conducting the defense session is to check the knowledge of a student, research aptitude and how he or he had done their research. 

It is a kind of evaluation process in which experts ask questions and point out gaps in research presented by a student.

Read more: 10 Genuine Suggestions to Design a PhD Title .

What is the process of thesis defense? 

The process of PhD thesis defense starts with the general introduction of experts followed by the presentation session. A candidate has to present their thesis in a PowerPoint presentation, keynotes or google slides. 10 to 20 minutes are alloted to present the work in 15 to 25 slides. 

Soon after, experts ask questions related to research. Several of them are, 

What is the purpose of the present research? 

Why is the present topic chosen? 

What is the study population and why only those are selecting 

What are the outcomes of the present work? 

Why are the results or outcomes important? 

What are the societal benefits of the present work? 

How or what the present research contributes to the present knowledge? 

These are the common questions asked to know the quality, quantity and strength of the research one has conducted. 

The process is of two types; close thesis defense viva and open thesis defense viva. 

In the close thesis defense viva, only a subject expert and a PhD supervisor conduct the entire process of the thesis defense, no one is allowed to interfere in it. A student can defend their thesis confidently, on the positive side, however, sometimes the integrity of the session doesn’t maintain due to lack of a monitoring body. 

During the open thesis defense, anyone can appear in the viva session including students of master’s and graduation. Also, anyone can ask questions related to the topic. 

Open thesis defense sometimes makes things harder for the prospective student. Which type of viva or defense system you have to face will depend on the university. The process and type of thesis defense vary from country to country and university to university.  

2 to 5 examiners or external evaluators are invited for a PhD thesis defense session by the university. The criteria to select examiners for the same are; they should be not from the university, they are experts in a related subject, they are working outside the university. 

University allows a PhD supervisor to the defense session but they can’t participate in the discussion. Examiner examines the thesis and will randomly ask queries to the presenter. 

Who conducts a thesis defense? 

The thesis defense of master’s, M Phil or PhD is held by the university under the vigilance of the supervisor for the student appearing in the degree. 

A PhD supervisor invites two or three other experts of the subject to conduct the session, university presentative or vice-chancellor closely monitors the entire process, if present. 

Related article: How much does a PhD Degree Cost in the USA, UK and India?

How long a thesis defense occurs? 

Per student 10 to 20 minutes are allotted to defend the thesis, however, it may vary, depending on how long a verbal questioning session happens. If it is interesting, it may take up to 2 hours. 

Sometimes, experts wind things in 30 minutes too; that depends on how neatly you have written your thesis and how beautifully you have given your presentation. Still, a few questions are common and asked in every thesis defense. 

Usually 20 minutes to 2 hours it takes to complete the thesis defense. 

What happens after the completion of the thesis defense? 

Defending a thesis isn’t like giving a written exam, which means the results are not like ‘pass’ or ‘fail’. The results are like how excellently one has done their doctorate- research, thesis and presentation. 

There are three possibilities after completing the PhD viva or thesis defense.

• First, you have successfully completed it.
• Second, you have failed in defending the thesis- revision required. 
• Third, there are chances of improvement- minor revision required. 

When you present your thesis excellently, write the dissertation in a proper way and accurately- like a professional writer, proofread it correctly, complete all the objectives mentioned in the thesis, done research in a proper way, you probably come in the first case. 

A PhD degree will be awarded to you soon! 

If a thesis is not written in a good way, not all the objectives are completed, not published a paper, or fails to write a thesis completely or it is partially incomplete, you fail in defending the thesis, need revision.

In this case, you have to re-appear in the Ph.D. to complete the incomplete work. 

The third case is a bit different in which a student is advised to do some minor changes and improvements to make their own thesis much better. Usually, re-viva is not conducted in these cases. 

In the second case, in which a student fails to defend their thesis, re-viva and second round of thesis defense will be conducted after six months or a year. 

Note that awarding the thesis entirely depends on the external examiner. 

Also read: PhD vs PsyD- Differences .

Can anyone fail in the thesis defense? 

I can say yes! But not exactly because it is not an examination. A candidate has to appear again after sometimes to defend the thesis. Here are the cases in which we can say, a candidate failed thesis defense.

• Improper, incorrect or partial thesis. 
• Incomplete objectives. 
• Incomplete research work. 
• Lack of significant outcomes. 
• No publication 
• Fail to answer questions during the defense. 

Practically it is not considered as ‘fail’, re-viva or another round of thesis defense will be conducted. 

Tips to successfully defend the thesis for PhD: 

When you will be on your presentation, an examiner opens your thesis; thoughts of curiosity, nervousness, excitement and energy will flow around you, all at once. 

In these conditions, even if your preparation is excellent, a small mistake can ruin everything for you. 

You have to balance your positive as well as negative emotions at the same time. Here are some of the tips that definitely help you to defend your PhD thesis successfully. 

Fill yourself with positivity: 

You are very near to your goal, one step ahead of getting a degree- an utmost academic honor- the PhD. Surely, you need to balance everything, as I said, but to do so, you need to behave positively. 

Even if you know the gaps, problems, limitations and problems of your PhD thesis, yourself or your knowledge, you need to keep calm and behave like everything will be on your side. 

Only you know what is not perfect in your presentation or thesis, why to show it to others! Stay calm, focus, confident and positive like everything is perfect there. 

If you still feel so negative, imagine there are so many students in the world who have not even reached this level! You are here, on the last step of the PhD- feel proud of yourself. 

Related article: Writing a Research Paper for a Ph.D. Dissertation.

Dress well, look well: 

To feel confident and positive, you have to look better. Wear a good, decent and formal dress, shave your beard or trim it, style your hair and polish your shoes. If you will look good, a positive and joyful atmosphere will be constructed in the room that will definitely help you. 

Don’t look tired, hopeless, restless, sleepless. 

Checklist all things: 

A couple of things are required during the PhD viva or thesis defense session. One is the presentation and the second is the thesis. In addition to this, don’t forget to take other documents related to your PhD like your plagiarism clearance certificate, your registration certificate and even your logbook. 

One can’t appear in the thesis defense session without a presentation and thesis. 

Other things are secondary in this case. 

Also read: How to Avoid Plagiarism in Your PhD Thesis?

Prepare a good presentation: 

Before preparing a PhD presentation, you need to know in which format the university allows to present the thesis. However, the globally accepted format is Microsoft Powerpoint. 

Prepare a good, decent and professional PhD presentation of 10 to 15 slides and save it in multiple formats. Include only necessary information, I know it is very difficult to summarize the 4000 to 5000-word essay in 10 slides. 

Also, don’t forget to include material, methods, theory, results and outcome of the research, those things are very essential. Make your presentation correct with your PhD supervisor before appearing in the thesis defense. 

Make a backup: 

What if your presentation will not run on the day of defending the thesis? What if you lost your hardcopy of the thesis? that is not good, right! 

 You are a PhD student , above all, out of the box thinking ability and good analytic thinking, how can you forget to make backups? 

Backup your presentation in a flash drive, cloud storage and email. Prepare presentations in multiple formats.

Make the back of the thesis soft copy as well and store it on different devices that are easily accessible in case of emergency. In addition to this, also prepare a rough and unbounded draft of the thesis hardcopy as a backup. 

Control yourself: 

Students who have done their PhD sincerely are confident about their work but it is very important to control yourself during the thesis defense. In any harsh condition don’t lose your calm, don’t be aggressive.

Even if you know that the expert is wrong- that is a rare case scenario, respect their opinion and behave accordingly. See it is obvious, no one knows more than you and your guide about your topic.

Try to explain things to the panel member, if it can’t work, leave it, respect their opinion and take it as suggestions. 

Read more: 10 PhD Programs You can choose to Study- A Comprehensive Guide .

Answer to the point: 

Sometimes it happens that you explain things more than the experts’ needs. There are drawbacks of explaining things elaborately, they can trap you! 

As I said, pay attention to the question asked by the expert and try to answer what they want, not more than that. Explain things if they don’t understand. 

Do this if you don’t have an answer: 

Experts’ duties are to find gaps and problems in your research so that they can find knowledge actually required. So it is obvious, they confuse you, and ask questions which you don’t know. 

 Don’t get nervous or panic, if you don’t know the answers. Take a deep breath and admit that you don’t have the answer or don’t have an idea about that. To support this situation, you can even make an assumption that this might happen or this will be the reason or give a probability.

See thesis defense is not like a viva, questions will be intellectual and will challenge your knowledge and thinking every time for sure. You have to show them your ability to think differently, not what to already know! 

Also read: 50 various PhD degree full forms .

Do this if something wrong happens! 

Days change, some are good, rest are bad. Things will be on your side someday, or not on other days. What you will do if something wrong happens whilst defending the thesis? 

Your presentation may not work, You lost your thesis, a big problem with the thesis- you didn’t know and problems in findings of results; these are some common problems I had seen in PhD viva. 

So you have to prepare for that, what to answer in those conditions. Anyone can make mistakes, simply apologize and request panel members that you will fix the problem soon. See, you have to act as per the situation, I can not tell you what you say in which conditions. 

For instance, if your presentation is not working or electricity is not there on the day of the presentation simply apologize for that, present it with the available utilities like chalk and blackboard.

The important thing is don’t panic, apologize first, and request to continue the presentation. For instance, if there is a major issue in the thesis, request the examiner that you will fix it, please allow you to continue the presentation. Try to complete your presentation, anyhow, who knows if they will impress. 

Be prepared for the most common questions: 

 The 10th tip is very useful and kind of a hack for you. There are several questions asked routinely during every thesis defense session. For instance,  what is the purpose of your research? How outcomes help society? Why have you chosen this topic? Why have you selected this technique for your work? What are the applications of your research? Like that. 

Be prepared for these questions, a few of them will be asked during the session. Then after the discussion will pick the heat, and your thinking ability will be tested. 

Read more: What is PhD?- History, Definition, Origin, Requirement, Fees, Duration and Process .

Conclusion: 

Thesis or dissertation and PhD viva or thesis defense aren’t mandatory for all. Some professional degrees seek only internships for the award of PhD or doctorate. IN PhD in medicine or psychology, thesis or viva isn’t conducted, though the criteria are decided by the universities and hence vary greatly. 

Still, the thesis defense is a common practice performed to award PhD, M Phil or post-graduation degree. 

Dr. Tushar Chauhan is a Scientist, Blogger and Scientific-writer. He has completed PhD in Genetics. Dr. Chauhan is a PhD coach and tutor.

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Planning and Passing Your PhD Defence: A Global Toolbox for Success

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Preparing for your thesis defence

As you start thinking about the end stages of your PhD, it’s important to understand the processes and timelines related to the thesis defence.

Even if your defence feels far away, there are steps you can take early on in order to ensure that the end of your PhD and defence process runs smoothly.

Jump to: What is a PhD defence? | Who's at the defence? | What happens at the defence? | What are the possible outcomes of the defence?  

What is a PhD defence?

The thesis defence is a unique opportunity to share with other experts what you did as part of your PhD research, what you found or discovered, and why it’s important. Although there are a lot of regulations guiding the defence process, remember that this process is really about you and your work.  

Goals of the PhD defence:

• Allow you to show your mastery of the subject matter
• Prove you are the author of the world
• Demonstrate your ability to engage in scholarly discourse in your research area

Who's at the PhD defence?

The primary attendees of your PhD defence are the Chair of the defense and your examining committee. The Chair is an impartial faculty member from outside your department who is well-versed in the rules and proceedings of thesis examinations. The Chair does not question you and does not assess your work.

Examining committee:

• Supervisor(s) - Your thesis supervisor(s) that have supervised your research.
• Internal member - A member of your department; typically part of your advisory committee.
• Internal/external member - An "internal" member of the university, but "external" to your home department. This person has suitable knowledge of the subject matter, even though they are from another discipline.
• Additional member - Typically a member from your advisory committee.
• External examiner - A person with a doctoral degree and expertise in the subject matter who evaluates the thesis from a fair an impartial perspective.

At University of Waterloo, it is also standard to have defences open to the public, so you can invite your friends, family and colleagues to be there! Check with your department to figure out what options are available to you.  

In some cases, such as when there are intellectual property concerns, a closed thesis examination can be requested. This means that all those in attendance at the thesis examination, including the examining committee members, must sign a non-disclosure agreement.  Closed examinations must be requested as early as possible.

What happens at the defence?

The first component of the defence is the welcome. The Chair will open up the defence, go over the order of proceedings, introduce the examining committee, and welcome the attendees.

After the welcome, the examination will formally begin with your oral presentation. The presentation is no more than 30 minutes, but the exact length and format can vary by department or discipline. It's best to check with your supervisor to confirm departmental expectations, but overall, the presentation should focus on your main contributions and conclusions. 

The final component of the defence is the questioning period. This is not meant to be an interrogation, rather, a discussion amongst colleagues about the subject of your thesis.

• The examination Chair monitors the question period, which goes in "rounds".
• During the first round of questioning, each committee member will have 15 minutes to ask their questions, provide their comments, and discuss these with you.
• After each committee member has had their turn to ask questions, there may be additional rounds for more questions. The Chair and committee decide when the questions will end.
• Typically, the Chair will reserve some time at the end to accept questions from non-committee members.

While there is no set time for defences at the University of Waterloo, they typically range from 2-3 hours. 

What are the possible outcomes?

Once your formal defence has concluded, the examination Chair will arrange for a private deliberation between the committee members. The examination committee's decision is ultimately based on your written thesis, as well as your ability to defend it, as the decision is determined by a majority vote.

In the event of a tie decision, or if the external examiner's vote is not in the majority, the decision will be deferred to the Associate Vice President (AVP), Graduate Studies and Postdoctoral Affairs. The AVP will consult the Faculty Associate Deans and come to a final decision. 

Once the deliberation has concluded, the Chair will inform you of your examining committee's decision.

There are three possible outcomes to a PhD defence:

• Accepted: The thesis is completed to the satisfaction of the examining committee. There may still revisions required, but they are likely minor and typographical or editorial in nature. In this case, you would have one month to complete all revisions and submit your approve thesis to UWspace.
• Accepted conditionally: The oral defence and the thesis are acceptable, but content changes are required that are time intensive. In this case, you would have four months to complete revisions to the approval of your committee and submit the final version to UWspace. A re-examination is not required. 
• Re-examination: The oral defence is not to the satisfaction of the committee and/or substantial changes to the thesis are required. In this case, the candidate must be re-examined within 1 year. 

Re-examination is very rare, and the vast majority of candidates have their thesis accepted at their first examination.

Related links

• Thesis and defence
• Timeline to defence
• Successful defence tips
• Remote defence tips

13 Tips to Prepare for Your PhD Dissertation Defense

How well do you know your project? Years of experiments, analysis of results, and tons of literature study, leads you to how well you know your research study. And, PhD dissertation defense is a finale to your PhD years. Often, researchers question how to excel at their thesis defense and spend countless hours on it. Days, weeks, months, and probably years of practice to complete your doctorate, needs to surpass the dissertation defense hurdle.

In this article, we will discuss details of how to excel at PhD dissertation defense and list down some interesting tips to prepare for your thesis defense.

Table of Contents

What Is Dissertation Defense?

Dissertation defense or Thesis defense is an opportunity to defend your research study amidst the academic professionals who will evaluate of your academic work. While a thesis defense can sometimes be like a cross-examination session, but in reality you need not fear the thesis defense process and be well prepared.

Source: https://www.youtube.com/c/JamesHaytonPhDacademy

What are the expectations of committee members.

Choosing the dissertation committee is one of the most important decision for a research student. However, putting your dissertation committee becomes easier once you understand the expectations of committee members.

The basic function of your dissertation committee is to guide you through the process of proposing, writing, and revising your dissertation. Moreover, the committee members serve as mentors, giving constructive feedback on your writing and research, also guiding your revision efforts.

The dissertation committee is usually formed once the academic coursework is completed. Furthermore, by the time you begin your dissertation research, you get acquainted to the faculty members who will serve on your dissertation committee. Ultimately, who serves on your dissertation committee depends upon you.

Some universities allow an outside expert (a former professor or academic mentor) to serve on your committee. It is advisable to choose a faculty member who knows you and your research work.

How to Choose a Dissertation Committee Member?

• Avoid popular and eminent faculty member
• Choose the one you know very well and can approach whenever you need them
• A faculty member whom you can learn from is apt.
• Members of the committee can be your future mentors, co-authors, and research collaborators. Choose them keeping your future in mind.

How to Prepare for Dissertation Defense?

1. Start Your Preparations Early

Thesis defense is not a 3 or 6 months’ exercise. Don’t wait until you have completed all your research objectives. Start your preparation well in advance, and make sure you know all the intricacies of your thesis and reasons to all the research experiments you conducted.

2. Attend Presentations by Other Candidates

Look out for open dissertation presentations at your university. In fact, you can attend open dissertation presentations at other universities too. Firstly, this will help you realize how thesis defense is not a scary process. Secondly, you will get the tricks and hacks on how other researchers are defending their thesis. Finally, you will understand why dissertation defense is necessary for the university, as well as the scientific community.

3. Take Enough Time to Prepare the Slides

Dissertation defense process harder than submitting your thesis well before the deadline. Ideally, you could start preparing the slides after finalizing your thesis. Spend more time in preparing the slides. Make sure you got the right data on the slides and rephrase your inferences, to create a logical flow to your presentation.

4. Structure the Presentation

Do not be haphazard in designing your presentation. Take time to create a good structured presentation. Furthermore, create high-quality slides which impresses the committee members. Make slides that hold your audience’s attention. Keep the presentation thorough and accurate, and use smart art to create better slides.

5. Practice Breathing Techniques

Watch a few TED talk videos and you will notice that speakers and orators are very fluent at their speech. In fact, you will not notice them taking a breath or falling short of breath. The only reason behind such effortless oratory skill is practice — practice in breathing technique.

Moreover, every speaker knows how to control their breath. Long and steady breaths are crucial. Pay attention to your breathing and slow it down. All you need I some practice prior to this moment.

6. Create an Impactful Introduction

The audience expects a lot from you. So your opening statement should enthrall the audience. Furthermore, your thesis should create an impact on the members; they should be thrilled by your thesis and the way you expose it.

The introduction answers most important questions, and most important of all “Is this presentation worth the time?” Therefore, it is important to make a good first impression , because the first few minutes sets the tone for your entire presentation.

7. Maintain Your Own List of Questions

While preparing for the presentation, make a note of all the questions that you ask yourself. Try to approach all the questions from a reader’s point of view. You could pretend like you do not know the topic and think of questions that could help you know the topic much better.

The list of questions will prepare you for the questions the members may pose while trying to understand your research. Attending other candidates’ open discussion will also help you assume the dissertation defense questions.

8. Practice Speech and Body Language

After successfully preparing your slides and practicing, you could start focusing on how you look while presenting your thesis. This exercise is not for your appearance but to know your body language and relax if need be.

Pay attention to your body language. Stand with your back straight, but relax your shoulders. The correct posture will give you the feel of self-confidence. So, observe yourself in the mirror and pay attention to movements you make.

9. Give Mock Presentation

Giving a trial defense in advance is a good practice. The most important factor for the mock defense is its similarity to your real defense, so that you get the experience that prepares for the actual defense.

10. Learn How to Handle Mistakes

Everyone makes mistakes. However, it is important to carry on. Do not let the mistakes affect your thesis defense. Take a deep breath and move on to the next point.

11. Do Not Run Through the Presentation

If you are nervous, you would want to end the presentation as soon as possible. However, this situation will give rise to anxiety and you will speak too fast, skipping the essential details. Eventually, creating a fiasco of your dissertation defense .

12. Get Plenty of Rest

Out of the dissertation defense preparation points, this one is extremely important. Obviously, sleeping a day before your big event is hard, but you have to focus and go to bed early, with the clear intentions of getting the rest you deserve.

13. Visualize Yourself Defending Your Thesis

This simple exercise creates an immense impact on your self-confidence. All you have to do is visualize yourself giving a successful presentation each evening before going to sleep. Everyday till the day of your thesis defense, see yourself standing in front of the audience and going from one point to another.

This exercise takes a lot of commitment and persistence, but the results in the end are worth it. Visualization makes you see yourself doing the scary thing of defending your thesis.

If you have taken all these points into consideration, you are ready for your big day. You have worked relentlessly for your PhD degree , and you will definitely give your best in this final step.

Have you completed your thesis defense? How did you prepare for it and how was your experience throughout your dissertation defense ? Do write to us or comment below.

The tips are very useful.I will recomend it to our students.

Excellent. As a therapist trying to help a parent of a candidate, I am very impressed and thankful your concise, clear, action-oriented article. Thank you.

Thanks for your sharing. It is so good. I can learn a lot from your ideas. Hope that in my dissertation defense next time I can pass

The tips are effective. Will definitely apply them in my dissertation.

My dissertation defense is coming up in less than two weeks from now, I find this tips quite instructive, I’ll definitely apply them. Thank you so much.

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PhD Dissertation Defense Slides Design: Start

• Tips for designing the slides
• Presentation checklist
• Example slides
• Additional Resources

Purpose of the Guide

This guide was created to help ph.d. students in engineering fields to design dissertation defense presentations. the guide provides 1) tips on how to effectively communicate research, and 2) full presentation examples from ph.d. graduates. the tips on designing effective slides are not restricted to dissertation defense presentations; they can be used in designing other types of presentations such as conference talks, qualification and proposal exams, and technical seminars., the tips and examples are used to help students to design effective presentation. the technical contents in all examples are subject to copyright, please do not replicate. , if you need help in designing your presentation, please contact julie chen ([email protected]) for individual consultation. .

• Example Slides Repository
• Defense slides examples Link to examples dissertation defense slides.

Useful Links

• CIT Thesis and dissertation standards
• Dissertations and Theses @ Carnegie Mellon This link opens in a new window Covers 1920-present. Full text of some dissertations may be available 1997-present. Citations and abstracts of dissertations and theses CMU graduate students have published through UMI Dissertation Publishing. In addition to citations and abstracts, the service provides free access to 24 page previews and the full text in PDF format, when available. In most cases, this will be works published in 1997 forward.
• Communicate your research data Data visualization is very important in communicating your data effectively. Check out these do's and don'ts for designing figures.

Power Point Template and other Resources

• CEE Powerpoint Slide Presentation Template 1
• CEE Powerpoint Slide Presentation Template 2

Source: CEE Department Resources https://www.cmu.edu/cee/resources/index.html

• CMU Powerpoint Slide Template

Source: CMU Marketing and Communications

https://www.cmu.edu/marcom/brand-standards/downloads/index.html

• Use of CMU logos, marks, and Unitmarks

Email me for questions and schedule an appointment

Top 7 tips for your defense presentation

1. show why your study is important, remember, your audience is your committee members, researchers in other fields, and even the general public. you want to convince all of them why you deserve a ph.d. degree. you need to talk about why your study is important to the world. in the engineering field, you also need to talk about how your study is useful. try to discuss why current practice is problematic or not good enough, what needs to be solved, and what the potential benefits will be. , see how dr. posen and dr. malings explained the importance of their studies..

• Carl Malings Defense Slides with Notes
• I. Daniel Posen Defense Slides with Notes

2. Emphasize YOUR contribution 

Having a ph.d. means that you have made some novel contributions to the grand field. this is about you and your research. you need to keep emphasizing your contributions throughout your presentation. after talking about what needs to be solved, try to focus on emphasizing the novelty of your work. what problems can be solved using your research outcomes what breakthroughs have you made to the field why are your methods and outcomes outstanding you need to incorporate answers to these questions in your presentation. , be clear what your contributions are in the introduction section; separate what was done by others and what was done by you. , 3. connect your projects into a whole piece of work, you might have been doing multiple projects that are not strongly connected. to figure out how to connect them into a whole piece, use visualizations such as flow charts to convince your audience. the two slides below are two examples. in the first slide, which was presented in the introduction section, the presenter used a flow diagram to show the connection between the three projects. in the second slide, the presenter used key figures and a unique color for each project to show the connection..

• Xiaoju Chen Defense Slides with Notes

4. Tell a good story 

The committee members do not necessarily have the same background knowledge as you. plus, there could be researchers from other fields and even the general public in the room. you want to make sure all of your audience can understand as much as possible. focus on the big picture rather than technical details; make sure you use simple language to explain your methods and results. your committee has read your dissertation before your defense, but others have not. , dr. cook and dr. velibeyoglu did a good job explaining their research to everyone. the introduction sessions in their presentations are well designed for this purpose. .

• Laren M. Cook Defense Slides with Notes
• Irem Velibeyoglu Defense with Notes

5. Transition, transition, transition

Use transition slides to connect projects , it's a long presentation with different research projects. you want to use some sort of transition to remind your audience what you have been talking about and what is next. you may use a slide that is designed for this purpose throughout your presentation. , below are two examples. these slides were presented after the introduction section. the presenters used the same slides and highlighted the items for project one to indicate that they were moving on to the first project. throughout the presentation, they used these slides and highlighted different sections to indicate how these projects fit into the whole dissertation. .

You can also use some other indications on your slides, but remember not to make your slides too busy.  Below are two examples. In the first example, the presenter used chapter numbers to indicate what he was talking about. In the second example, the presenter used a progress bar with keywords for each chapter as the indicator. 

Use transition sentences to connect slides 

Remember transition sentences are also important; use them to summarize what you have said and tell your audience what they will expect next. if you keep forgetting the transition sentence, write a note on your presentation. you can either write down a full sentence of what you want to say or some keywords., 6. be brief, put details in backup slides , you won't have time to explain all of the details. if your defense presentation is scheduled for 45 minutes, you can only spend around 10 minutes for each project - that's shorter than a normal research conference presentation focus on the big picture and leave details behind. you can put the details in your backup slides, so you might find them useful when your committee (and other members of the audience) ask questions regarding these details., 7. show your presentation to your advisor and colleagues, make sure to ask your advisor(s) for their comments. they might have a different view on what should be emphasized and what should be elaborated. , you also want to practice at least once in front of your colleagues. they can be your lab mates, people who work in your research group, and/or your friends. they do not have to be experts in your field. ask them to give you some feedback - their comments can be extremely helpful to improve your presentation. , below are some other tips and resources to design your defense presentation. .

• Tips for designing your defense presentation

How important is your presentation, and cookies?

• Next: Tips for designing the slides >>
• Last Updated: Jan 9, 2024 11:18 AM
• URL: https://guides.library.cmu.edu/c.php?g=883178

Hints for PhD Defenses

At Columbia, PhD defenses are generally not public, although CS usually allows a student audience. Defenses consist of four parts: first, the candidate introduces themselves, then presents a summary of their work, interrupted and followed by questions from the committee. Finally, the committee meets in private to discuss the presentation and dissertation.

While most of the committee will have read most of your thesis, you cannot assume that everyone has read every chapter.

The committee needs to be able to assess impact and depth. Usually, the committee has some idea of this before the defense, but whatever the student can say to make this assessment easier, perhaps just through emphasis, is likely to make the defense go much more smoothly.

Generally, the whole defense will not take more than two hours, but should take considerably less time. Part of the challenge of a defense is to convince the committee that you can summarize the important points of your work in a very limited time.

• What is the problem you are studying?
• Why is it important ?
• What results have you achieved?
• Some committee members will want to know if the works has been published and where and how it was received. For example, if you have written software, indicate where it is being used, either for follow-on work or in some production or test environment.
• Have a list of your thesis-related publications as a slide. Indicate any awards that a paper may have received. For most people, it's easier to list some honor than "brag" about it in person.
• If you have presented your work in a conference or at job talks, be sure to anticipate and address the most common questions asked there.
• The committee should be handed a copy of your slides.
• Be prepared to briefly summarize your background (undergraduate degree, how long at the university, etc.)
• No more than 30 slides, plus "back up" slides with additional material in case of questions. The most effective way of making your committee members mad is to come unprepared with a stack of 80 slides and then madly skip through them.
• Number your slides, particularly if one of your committee members is linked in via speakerphone. Consider using some kind of remote presentation software.
• List your contributions early.
• When presenting your contributions, be sure to use "I" and not "we" so that the committee will know what aspects of the work where yours, and which were group projects.
• Keep discussions of related work very brief, but be prepared to answer questions of the "how does this differ from so-and-so's work" succinctly.
• You will not be asked to prove results again.
• Be prepared to back up any comparative statement with facts, in particular statements like "works better", "faster", "scalable" or "optimal". If you are presenting a protocol, how do you know that it works correctly?
• If you have multiple parts in your dissertation, consult with the committee ahead of time as to whether it makes sense to omit some of them for the presentation.

Hints for Dissertations

• It is better to focus deeply on a single area then to work on several topics, each of which is pursued to a moderate depth.
• Systems work must be coupled with implementation and some kind of numerical comparitive analysis to demonstrate the improvements from existing or alternate approaches.
• Your thesis needs a one page executive summary that a layperson should be able to understand. Test: give it to a relative of yours that does not have an engineering degree...

Miscellaneous Hints

• You are likely only to defend a PhD thesis only once; your defense is a special occasion, so consider dressing appropriately, at least business casual, but a suit is not inappropriate.
• It is customary to provide refreshments for the audience, such as coffee, bagels, cookies and fruit, depending on the time of day.

The Role of PhD Committee Members

• Committee members (should) read the draft thesis (and provide feedback). Obviously, students appreciate an in-depth reading, but it is common for committee members to focus on chapters closest to their expertise. Reading depths varies - some provide line edits, others just suggest larger issues that should be addressed ("Your related work section in Chapter 10 is a bit sparse and ends in 2005."). While this is probably not the place to suggest "do another year of research", filling in gaps is ok and I'd rather postpone a defense by a month if needed. Before the committee gets the thesis, I've done a first or sometimes second reading, but the whole point of the committee is to keep the advisor honest (and complement his or her knowledge or taste).
• Committee members attend the PhD defense, usually in person. Typically, this lasts about 90 minutes. Take notes on any editorial improvements (e.g., "make clear that the throughput graph is measured in gallons/minute"). Vote on the outcome and sign the form.
• If the student is given a set of changes to implement, the advisor asks students to detail on how they implemented the changes, similar to how an author may respond to reviewer comments for a journal. The committee informally signs off, or not, on these changes. There is no need to re-read the thesis.

Checklist for Dissertation

• Spell check;
• Check for missing chapter or figure references;
• Section, Chapter, Figure are capitalized;
• All references converted from [1][2][3] to [1,2,3];
• Consistent capitalization in captions;
• Verify expansion of all abbreviations at first instance;
• Avoid "tremendous", "huge" and other similar adjectives;
• End to end -> end-to-end;
• Check references for capitalization of abbreviations and missing data such as page numbers.

(Contributions by Ed Coffman, Jonathan Rosenberg and Sal Stolfo.)

Translations: Polish

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What time of day should I schedule my thesis defense?

With apologies for the attention-grabbing title: of course I am not actually asking you to tell me when I, specifically, should schedule my defense. But I have heard very plausible-sounding rumors that the time of day at which a PhD candidate holds their thesis defense can have an impact on the difficulty and even the candidate's chance of passing. For example, scheduling a defense just before lunch may mean the committee will ask fewer and less involved questions, because they will be anxious to finish so they can go eat. Similarly defending in the mid afternoon may lead to less complex questions because everyone is tired - or alternatively it could cause a more difficult defense because the committee members are in no hurry to get back to work. And so on; the rumors abound.

What I would like to know: is there is any research backing up the idea that there are better or worse times of day for a candidate to schedule their thesis defense? Any anecdotal experience from people who have sat on multiple PhD committees?

Of course I'm not claiming this should be a major influence on when one schedules their defense, but people do talk about it, so (as a scientist!) I can't help but wonder if there's any truth behind the idea.

• 14 +1 for overthinking it. :) You'll do fine I'm sure, just don't schedule it for midnight or something. –  badroit Commented Apr 23, 2014 at 23:09
• 30 Do you really have that much freedom in scheduling? In my department, finding an hour when all the very busy committee members can be in the same room is always a struggle. –  ff524 Commented Apr 23, 2014 at 23:18
• 3 @ff524 Me too. The challenge was getting 5 faculty members in a room at the same time, and it was scheduled for the single two-hour gap that could be found in the tangled nightmare that is faculty scheduling. –  Fomite Commented Apr 23, 2014 at 23:44
• 29 Maybe this depends on your academic system, but in most, unless your advisor is incompetent or your committee is insatiable, your chance of passing is 1. At very worst, 1-o(ε). The effect of the time of day is like o(ε³). Stop worrying! –  Nate Eldredge Commented Apr 24, 2014 at 0:08
• 8 I'm just going to leave this here. Make sure you provide a small snack (cookies, cupcakes, traditional ethnic petit fours, etc.)! –  Bill Barth Commented Apr 24, 2014 at 1:15

4 Answers 4

First, I have never heard of any research backing up the idea that defenses will be more less successful based on the time of day the defense is held.

Second, the best time to defend is whenever your committee can actually make it . When I defended, my goal was to get get at least three of our four committee members in same physical room (one non-chair member could attend via video). Within a six-week window, I felt lucky to find any two hour-window to schedule the defense.

Finally, you are overthinking things . Pour your energy and concern into the content and remember that if your committee is encouraging you to defend, it's because they think you are ready. Surprises are unlikely.

Of course if you are in the enviable position of having to choose a time of day, I personally like defenses at the end of the work day so that you can head out with others — e.g., students, family members, maybe even committee members — for a celebratory post-defense drink or meal.

• 2 I'm not disputing that any of this is true, but only the first paragraph really gets at what I'm asking. It's a precondition of the question that the committee members' availability does not determine a time, so saying the best time is whenever they can make it kind of dodges the question, and also I'm asking out of curiosity so it doesn't help me to be told I'm overthinking things. (I know it's silly to use this criterion to determine a time. But if I weren't a PhD candidate at all, that paragraph wouldn't make much sense :-P) –  David Z Commented Apr 24, 2014 at 5:58
• 1 @DavidZ, people interested in the best time of day to schedule a thesis will almost universally be PhC's. They will almost universally be worried by the fact that their fate in others' hands and so are worrying about the the little things they can control. The last paragraph also gives you a concrete suggestion for when to schedule your thesis and a reason why. :) –  mako Commented Apr 24, 2014 at 6:08
• 2 For the sake of argument: my defense is long past and I'm still interested :-P –  David Z Commented Apr 15, 2015 at 16:23
• 1 @DavidZ, Fair enough! –  mako Commented Apr 15, 2015 at 16:24

Whatever time of day all your committee members can all get together . (Forgive the short answer but that's really it from my perspective)

• 2 There is nothing new in this answer that wasn't already in Benjamin's original answer above. –  aeismail Commented Sep 26, 2018 at 2:21
• 1 @aeismail, I didn't mean to offend. I actually upvoted his answer. It is good. I hope it keeps more votes. However I felt a short, to the point answer was appropriate too. I've seen answers overlap a lot on Academia.SE. I'll reread the answer guidance to be sure I'm on target. Thanks for keeping me straight. –  SecretAgentMan Commented Sep 26, 2018 at 3:24
• 2 There can be overlap, but when the entirety of an answer is subsumed in another, it's considered poor form. (Also, a one-sentence answer is generally frowned upon, particularly on "soft" sites where the questions and answers tend to be more experience- and opinion-based by their nature.) –  aeismail Commented Sep 26, 2018 at 3:26
• 1 @aeismail, Thank you. I agree regarding one sentence answers but I respectfully feel a one-sentence answer is very appropriate here. I didn't consider the "poor-form" part and will work to avoid that in the future. Thanks for the lesson learned! –  SecretAgentMan Commented Sep 26, 2018 at 3:33
• 2 @aeismail I think that this answer is good because it makes clear in one line what is the most important thing. The other answer is less strong in this sense. –  Massimo Ortolano Commented Sep 26, 2018 at 8:18

I had mine at 1 pm. It finished at 3:30, which gave me one and a half hours to make all the necessary corrections and then get to the pub.

In retrospect, 1 pm was a good time. I'm not a morning person by any stretch of the imagination. 1 pm allowed me to roll out of bed at 10 am, have a good full English breakfast and have an hour just to flick through the thesis and post https://xkcd.com/1403/ on social media channels. If you're a morning person that's always super alert at the time of 9 am, then try to schedule it as early as possible in the morning.

Really, you know what time of day you personally feel most alert and responsive. Given the flexible working nature of a lot of PhD students, you've probably settled into a working routine that works well for you by now. My recommendation would be to plan it around that.

• Sorry I just noticed this - definitely good advice. It's not quite in the spirit in which I intended the question, i.e. taking all else to be equal (including what time of day the student is the best suited to work), is there a better time and what is it, but I wouldn't hesitate to endorse this to any student actually concerned with scheduling their defense. (Fun fact: that comic was posted the same day I defended.) –  David Z Commented Nov 19, 2018 at 9:08

This answer is the one I would accept. But, I know of one notable exception.

A friend in my PhD grad program choose his defense time for late morning (around 10 am) on a Tuesday. That way, his public defense would get done around 11 am and his closed door defense with only his committee would take less than a hour because his major advisor and several committee members always went to a local restaurant for their "Taco Tuesday" special around 11:45 am.

This worked for him, but my major advisor made me pick a different time when I tried to repeat the trick.

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Dissertation Committee

Dissertation defense process.

The dissertation defense is one of the most important moments in a graduate student’s career. When a student is deemed to be ready to defend the doctoral thesis, the student is the expert in a particular research area.  At the defense the student is expected to cogently and clearly explain their research and how it fits with other scholarship in the field of study. The exact nature of the oral defense may vary by discipline and department, so it is important that the student talk to the dissertation committee chair about what to expect and how to prepare.

The defense typically lasts about two hours and may be open to the public. The defense aims to accomplish two goals. First, it will provide an occasion for the presentation and recognition of the completed doctoral work. Second, it will furnish the opportunity for discussion and formal evaluation of the dissertation.

The timing of the defense will be set by the student in consultation with the dissertation committee. Students should contact their departments to schedule the dissertation defense. Note that some departments do not schedule examinations in summer. The student should send copies of the dissertation to the members of the committee no later than three weeks prior to the defense. The time and place of the defense shall be announced on the department’s calendar of events.  

The chair of the student's dissertation committee and at least one other committee member must be present in person. In the case that a committee member is unable to attend in person, the committee member may participate by Skype or other teleconference media. The defense must be open to all faculty within the department. Broader attendance will be left to the discretion of the student in consultation with the committee.

Please note: Departments will be allowed to have in-person defenses. Additionally, there is no reason to limit remote defenses if that is what the participants want and the department/committee approves. 

The dissertation defense shall be an open presentation by the student on the main aspects of the research reported in the dissertation, followed by questions, comments, and discussion. The chair of the dissertation committee or a designee shall act as the moderator of this discussion and shall have discretion to decide whether questions are germane to the topic of the dissertation. After discussion is completed, the departmental faculty in attendance and the dissertation committee will decide privately whether the dissertation defense has been satisfactory.

The dissertation chair or designee will report the results as soon as possible after the dissertation defense to the Dean of Students office by submitting a signed Report of Final Examination and a Dissertation Defense Form. If the manuscript is to undergo revisions, the student will be informed of the timeframe in which the revisions are to be completed.

Dissertation Submission

A final copy of the dissertation must be submitted following the procedure outlined on the  Dissertation Office  website by Friday of the seventh week of the quarter in which a student is graduating, sixth week in summer quarter. The defense should be held in sufficient advance of this deadline to allow revisions recommended by the student's dissertation committee.

Students should contact the Dissertation Office no later than early in the quarter in which they intend to graduate in order to resolve any questions or problems they may have in preparing the dissertation. The Dissertation Office staff is willing to look at a draft of the dissertation. Having them do so avoids both the expense and headache of having to re-format the dissertation. They offer a schedule to help students plan for a smooth process to meet these deadlines.

Additional requirements including where the dissertation must be submitted is available at: https://studentmanual.uchicago.edu/academic-policies/dissertation-requirements/

Office of the Dean of Students [email protected] 773.702.1552

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Ph.D. Defense Procedures

The Committee on Graduate Studies of the Columbian College of Arts & Sciences approved new requirements and procedures for the final examination, or Ph.D. defense, effective Fall 2023. Please review these requirements and best practices which should be used at all future CCAS Ph.D. final examinations.

1. Construction of the Final Examination Committee

The director of the dissertation research committee and the student should consult to choose the members of the final examination committee. The director of graduate studies in the program in which the student is enrolled may also be consulted in the selection process.

Each final examination committee must include at least five voting members who fulfill the following criteria:

• The dissertation research committee —A director and at least two committee members who have advised the student during the dissertation research process. (The director can be drawn from outside the program faculty in which the student is enrolled. If the director is from outside the program faculty, then the committee must also have a co-director from inside the unit. At least one other member of the student’s dissertation research committee should have regular, full-time status in the University. Other members of the GW faculty and external scholars can serve as members of the student’s dissertation research committee, if deemed appropriate by the program’s faculty.)
• An examiner (or examiners) —At least one examiner who has not played a direct role in the dissertation research process and is asked to read the dissertation only after all the members of the student’s dissertation research committee have approved the dissertation for defense. (If the student’s dissertation research committee comprises only three scholars, then at least two examiners are required for the final examination.)
• An external scholar —At least one member of the final examination committee must be drawn from outside the program faculty in which the student is enrolled. The external scholar may serve either as a member of the dissertation research committee or as an examiner. (Final examination committees could also include external scholars in each of these roles.)
• An examination chair —The examination must be chaired by a member of the program faculty in which the student is enrolled. The chair cannot be drawn from the dissertation research committee or examiners. It is recommended that the program’s director of graduate studies, if not an examiner or a member of the dissertation research committee, serve as chair. The chair takes no part in the examination itself, except, if asked, to pose an introductory question or elicit an opening summary from the student.

2. Pre-examination preparation

When all the members of the dissertation research committee agree that the dissertation is ready to be defended, the final examination may be scheduled. Whenever possible the final examination should be held in person, but hybrid or virtual final examinations are permitted, when necessary, provided that the student consents to such arrangements.

The version of the dissertation that is to be defended must be approved by all members of the dissertation research committee and circulated to all final examination committee members at least four weeks prior to the examination. Final examinations should be announced to the program faculty at the time the dissertation is circulated to examination committee members, and anyone who wishes to attend should be allowed to do so, assuming space is available.

3. Final Examination procedures

The examination chair assembles members of the final examination committee. While the student and any observers wait outside the room, the chair discusses examination procedures with committee members. Issues that are discussed should include the number of rounds of questioning, the order of questioning, and the time allocated for questioning. Typical practices include two rounds of questioning, with the examiner or examiners questioning the student first, followed by the other members of the examination committee, for 10-15 minutes per round. (The amount of time allocated to each examiner and committee member may vary, depending on the number involved in the final examination.)

Opening the examination—The student, the dissertation director/co-director, and the examination chair assemble at head of table for the following introduction:

• Examination Chair: This is a final examination for the degree of doctor of philosophy. I call on the director of the candidate’s research to present the candidate.

Dissertation Director/Co-Director: It is my/our pleasure to present [student name], who has completed all the requirements for the degree of doctor of philosophy in the field of [program name]. [Student name] and their/her/his dissertation are before the committee for examination.

The student, the dissertation director/co-director, and the examination chair take their places, and the examination begins. Typically, the student provides a brief (10-minute) summary of the research question, methodology, and main findings. This presentation may be omitted if the student has already made a presentation on the dissertation in the department.

When the questioning is completed, the student and any observers leave the room. The dissertation director (and co-director, if any) is called upon to make a case for the merits of the dissertation and the student’s performance at the final examination.

Each examiner and member of the dissertation research committee offers an evaluation of the dissertation and examination.

The final examination committee must decide (1) whether the student has passed or failed the examination, and (2) if the student has passed, what revisions to the dissertation, if any, are required. The decision to pass the dissertation and defense is reached by a majority vote of the final examination committee, excluding the examination chair. 

If revisions are required, the final examination committee must decide which members wish to see and approve the revised dissertation as well as the deadline by which revisions must be submitted. Ordinarily, only the director/co-director of the dissertation research committee reviews the revisions, but other research and examination committee members may be involved if they wish. Regardless, the director/co-director should be given clear instructions to convey to the student regarding the nature and timing of expected revisions.

Once these matters have been decided, the student and any observers are invited back into the room. The student assembles with the dissertation director/co-director and the examination chair at the head of table, and the chair announces the results of the examination to all present.

The dissertation director/co-director reports the results of the examination to the program’s director of graduate studies, who then completes the requisite paperwork and submits this paperwork to the Columbian College.

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Dr. Suzannah Hicks, ’24, DBA: What My DBA Dissertation and Defense Was Like

September 10th, 2024 by Susanne Wissell

If you are deciding between an academic PhD or a Doctor of Business Administration (DBA) degree, you may be interested in Dr. Suzannah Hicks’ experience. A professional data analyst and AI strategist, Suzannah recently earned her Doctor of Business Administration (DBA) degree through Johnson & Wales College of Professional Studies. She reflects on why she chose the DBA option and how writing and defending her dissertation has helped shape her career.

Why did you choose to earn a Doctor of Business Administration (DBA) degree?

Achieving this terminal degree has been a personal and professional goal all of my life..

I wanted a doctoral degree to support my goal of becoming an executive-level organizational leader. I was employed as a Data Strategist and Scientist for a not-for-profit organization dedicated to global information privacy. Recognizing that making data-driven decisions would benefit the organization, I worked hard to get leadership to buy into building a data team. The ideas I was formulating about data culture would later become a central focus of my dissertation.

I compared doctoral (PhD) degrees in data science with Doctor of Business Administration programs. Both are scholarly degrees; however, research in a PhD program emphasizes theoretical knowledge, while a DBA is geared toward applied research that I knew would support my goal to lead organizations in implementing innovative data and AI solutions. JWU’s DBA program, which has a concentration in Organizational Development, would be a powerful addition to my existing education and experience.

The JWU’s online DBA program was the perfect choice for me.

Working full-time, I needed a remote learning program, so I could complete assignments on my own schedule. JWU CPS’ curriculum made that possible because it is structured to deliver one course at a time in seven-week long classes. Every class in the DBA program offered practical information and guidance that I was consistently able to apply in my work. I was able to stay focused on both work and school, and ended the program with a dissertation I think is valuable and useful to the business environment.

How did you define your topic or problem for the dissertation?

Early in my DBA program I had planned to research the intersection between data privacy, marketing and business operations. I decided not to pursue that topic and chose instead to focus my dissertation topic on organizational data culture and how to drive its adoption.

Once I declared my topic, I used every class to advance my research for the dissertation. I tailored the final projects in each class to relate to building an organizational data culture. This strategy served me well — I was ahead when it came time to write my literature review, because I had already been researching the topic.

You accepted a new position while in the DBA program. How did changing jobs affect your dissertation?

During January 2024, six months before I was expecting to defend my dissertation, I accepted a full-time position as an AI Strategist, at Merchants Fleet. I believe that working toward my doctorate helped me get the job. Merchants Fleet was looking for a thought-leader, with expertise in the data and AI area, who could generate innovative ideas in preference to another engineer or technologist. They took a chance on me and fortunately, it has been an exceptional experience — one that is aligned with my career aspirations as a leader and strategist.

Originally my new organization was not a subject of my research; however, they agreed to become the subject after I changed my approach to data collection. Measuring an organization’s ‘culture’ is difficult. A highlight of my dissertation and defense was the methodology I developed by combining two previously unrelated survey instruments — one that measured an organization’s data analytics maturity and a second one that measured the decision-making style of the organization.

While the methodology needs to be repeated in other environments and be peer reviewed, the results suggest that the combined survey gives a valid — even powerful — measurement of data culture.

How did you prepare for your defense?

Most programs I had considered before enrolling in JWU’s online DBA program offered little academic support — students were on their own to research and write their dissertation. JWU follows a lock-step dissertation model that guides students through the dissertation process of defining, researching, writing and defending their thesis.

My primary advisor, Dr. Julie Bilodeau, was instrumental in helping me develop a successful dissertation. She provided support and feedback at every step. Dr. Larry Hughes, my methodologist, challenged my approach and my conclusions, which helped me produce better research and stronger results. My second reader, Dr. Eglen, provided ‘fresh eye’ perspective, which was extremely valuable.

As part of my preparation, I attended fellow students’ defenses, which helped me know what to expect. I also built up to the dissertation defense by first making academic presentations and by speaking at the Big Data Days virtual conference, hosted by Enterprise Big Data Framework.

When the time came to defend my dissertation, I felt thoroughly prepared to present the problem, why it was important in the business world and how my solutions could be implemented.

What was the dissertation defense process like?

Two weeks after completing numerous revisions and with the approval of my primary advisor, I defended my dissertation. Accustomed to making presentations remotely, I was comfortable defending the dissertation on Zoom.

Three members of my committee — my primary advisor, methodologist and second reader — attended with the Program Chair. I was allowed to invite students to join and view the defense, but they were not permitted to interact or ask questions.

The presentation of my dissertation lasted about 35 minutes, followed by questions from the committee about methodology. They asked how I reached a particular conclusion and how I might do things differently. Some of the questions were easy to answer, while many challenged me to defend my work.

The three committee members left the Zoom meeting and met together to discuss my defense. I felt anxious knowing there was no guarantee that the committee would decide to pass me. While we waited for 25 long minutes, the department chair and my guests were invited to ask questions or interact with me or each other.

When my committee returned, they informed me I had passed with revisions, a common result of three possible outcomes — pass, pass with revisions or fail. Pass with revisions means there were areas I needed to revise and clarify. I was asked to develop one insight I had gained to provide stronger evidence for my conclusions, as well as other more minor edits.

Going back and forth to make additional revisions heightened my frustration and anxiety. Waiting for feedback between revisions, while there was nothing to do, was more difficult for me than anything I faced while writing my dissertation. However, I appreciate that the process has strengthened my methodology and research results.

How did you implement your findings in your work setting?

Following the committee’s acceptance of my dissertation, I presented my findings to the Executive Team at Merchants Fleet. My company had been my research subject, so many of the findings relate directly to the organization and the work we do. Merchants has been enthusiastic about implementing a number of my suggestions, based on the research findings, which will create a stronger data culture, mature our data and analytics initiatives and improve our data work.

I’ve already made several professional presentations, as well as being interviewed about my dissertation topic on two podcasts. Through my workplace, I have been interviewed for two webinars and a trade journal for the fleet management industry. I’ve been told to expect more opportunities.

How did earning the DBA contribute to your long-term career goals?

Beyond achieving my life-long dream of earning a terminal degree, the DBA degree aligns with my career path as a data analyst and AI specialist. Currently I’m at the director level and a subject matter expert. The knowledge I’ve gained in the DBA program will help me advance to the executive level—possibly to vice president or further.

How did it feel to complete your defense and successfully earn your degree?

I remember smiling as I wrapped up my defense. Throughout my life l had been striving for success without knowing what success meant for me. Ultimately my dissertation and defense were successful because I knew my material and felt confident in my ability to discuss my research approach, methodology and findings and to answer questions. It didn’t matter that earning my doctorate was later in life than I had expected; it is never too late to achieve success.

JWU’s online DBA program

The online Doctor of Business Administration (DBA) program at Johnson & Wales has been recognized by Forbes Advisor as one of the 10 Best Online DBA Programs of 2024 . The DBA degree program prepares graduates to become executive level leaders, innovators, consultants, educators and policymakers. For more information about DBA program at Johnson & Wales College of Professional Studies, complete the Request Info form, call 855-JWU-1881, or email  [email protected] .

By clicking Get Started below, I consent to receive recurring marketing/promotional e-mails, phone calls, and SMS/text messages from Johnson & Wales University (JWU) about any educational/programmatic purpose (which relates to my inquiry of JWU) at the e-mail/phone numbers (landline/mobile) provided, including calls or texts made using an automatic telephone dialing system and/or artificial/prerecorded voice messages. My consent applies regardless of my inclusion on any state, federal, or other do-not-call lists. Consent is not a condition for receipt of any good or service. Carrier charges may apply. Terms and conditions apply .

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PhD Defense: Implementation of biomarkers in the management of Community-Acquired Pneumonia

Phd defense of ruud duijkers.

Chapter 1: We developed a real-time PCR test to detect pneumococci. The test was accurate both in vitro and  oropharyngeal patient samples. It showed good reliability and has a detection threshold of 1-10 DNA copies per reaction, with a very low chance of false positive results.

Chapter 2: We assessed a prediction score for identifying Legionella pneumonia at hospital admission. The score uses six variables: high fever, dry cough, low sodium, high LDH, high CRP, and low platelet count. The score was quite accurate, with an AUC of 0.89. A score of 4 or more showed a sensitivity of 58.8%  and specificity of 93.1%. This score could help initiating Legionella specific antibiotic treatment 

Chapter 3: We investigated how levels of cytokines could discriminate between viral, pneumococcal, and mixed pneumonia. We found that specific cytokine patterns could predict viral pneumonia with high accuracy (AUC=0.911). This method shows promising results, but more prospective studies are needed.

Chapter 4: We tested whether using a procalcitonin (PCT) and CRP algorithm could reduce the days on antibiotic treatment in patients hospitalized with community-acquired pneumonia (CAP). Patients guided by CRP or PCT had fewer days on antibiotics (4 and 5.5 days) than those receiving standard care (7 days). This approach can reduce antibiotic use by 30%.

Chapter 5: We checked if MR-proADM levels could predict short-term problems like treatment failure or re-admission in CAP patients. MR-proADM levels did not show clear differences related to these outcomes, making it not very useful for predicting short-term risks.

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OpenAI Just Released Its Long-Awaited "Strawberry" Model

It "performs similarly to phd students on challenging benchmark tasks in physics, chemistry, and biology.".

OpenAI has released its long-awaited AI model, reviously code-named "Strawberry."

As expected , the new model dubbed "OpenAI o1-preview" — an entirely new naming convention for the company — is "designed to spend more time thinking" before responding, pushing the boundaries on the kind of "complex tasks" and "harder problems" it can tackle, according to an update from the company.

The model has long been rumored to be a breakthrough in the company's aim to realize artificial general intelligence , the theoretical point at which an AI could outperform a human. The focus is to give the model a sense of "reasoning," enabling it to solve more complex math problems, for instance.

And if the company is to be believed, it already has some serious academic chops.

OpenAI claims the model "performs similarly to PhD students on challenging benchmark tasks in physics, chemistry, and biology."

But as its name suggests, the o1-preview is still in a pretty early state and plenty of future updates are to be expected.

"As an early model, it doesn't yet have many of the features that make ChatGPT useful, like browsing the web for information and uploading files and images," the company wrote. "For many common cases GPT-4o will be more capable in the near term."

As of right now, OpenAI o1 will be available to ChatGPT Plus and Team users. The company is also planning to bring a more lightweight version, dubbed o1-mini, to all free users of ChatGPT, but it has yet to reveal when that will happen.

OpenAI says that it designed its latest AI model with safety top of mind. In one of its "hardest jailbreaking tests," the new model scored 84 out of 100, compared to just 22 for its predecessor GPT-4o.

The new model "has been trained using a completely new optimization algorithm and a new training dataset specifically tailored for it," OpenAI's research lead Jerry Tworek told The Verge .

The company claims o1 could be used "by healthcare researchers to annotate cell sequencing data, by physicists to generate complicated mathematical formulas needed for quantum optics, and by developers in all fields to build and execute multi-step workflows."

Thanks to its new "chain of thought" process, it evaluates a number of answers to a query before choosing the best one. And that can take a while, especially when compared to the almost instantaneous answers we get from ChatGPT.

In a demo seen by The Verge , the model took 30 seconds to solve a reasoning puzzle involving a princess and prince's age.

As for its propensity to "hallucinate" facts, a glaring problem that has historically plagued AI chatbots , OpenAI appeared to be more realistic.

"We have noticed that this model hallucinates less," Tworek told The Verge . But "we can’t say we solved hallucinations."

The company's CEO Sam weighed in on the new model, saying it's "still flawed, still limited, and it still seems more impressive on first use than it does after you spend more time with it."

Does it amount to AGI, one questioner asked the exec.

"No," he replied .

More on OpenAI: OpenAI Launching "Strawberry" Model With "Human-Like Reasoning" as Soon as This Week

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Iran Gives Russia Short-Range Missiles, While U.S., Partners Expect to Keep Bolstering Ukrainian Air Defense

The United States has confirmed that Iran has given a number of close-range ballistic missiles to Russia. But a U.S. official said from the beginning of the Russian invasion, support to Ukraine has focused on air defense, and that this will continue — including with a focus on the threat posed by the new missiles.

"The United States has confirmed reports that Iran has transferred shipments of Fath 360 close-range ballistic missiles to Russia, which we assess could employ them within weeks against Ukraine, leading to the deaths of even more Ukrainian civilians," said Pentagon Press Secretary Air Force Maj. Gen. Pat Ryder during a briefing today. He added that right now, the department can't say how many missiles are involved.

The Fath 360 missiles, Ryder said, are believed to have a range of about 75 miles and would allow Russians to reserve more advanced missiles with longer ranges for other uses. 

"It is a short-range or close-range ballistic missile system," he said. "What this does is it would enable Russia to employ this capability while preserving its longer-range capabilities for use throughout the battlefield, thus deepening Russia's arsenal and also, again, giving it the ability to strike the kinds of targets that we've seen them striking, to include civilian targets." 

Russia invaded Ukraine in February 2022, and since then, through a variety of security arrangements, including with the Ukraine Defense Contact Group, the U.S. and partner nations have provided military support to Ukraine. A large focus has been on air defense, which Ryder said would continue. 

"Air defense has been something that we've been very focused on for a long time now when it comes to Ukraine," he said. "That has been a priority for the Ukrainians, and therefore it's been a priority for us. I point you back to UDCG, almost a year and a half ago, where [Secretary of Defense Lloyd J. Austin III] highlighted how critical this was." 

Since that time, Ryder said, U.S. and partner nations have been working to provide the Ukrainians with a variety of air defense systems meant to address both short-range and long-range missile threats. 

"Building that integrated air defense capability for Ukraine has been going on for a while now, and so we're not going to let up," Ryder said. "And [with] these missiles, while they certainly are going to present a threat, we're going to work with Ukraine to ensure ... that they have the capabilities needed to defend against these missiles and other missiles that Russia is using, to include drones." 

The United States has committed more than $55.9 billion in security assistance to Ukraine since the beginning of Russia’s invasion in February 2022. Air defense systems are featured heavily in that security assistance. Among the air defense systems provided are Patriot air defense batteries; National Advanced Surface-to-Air Missile Systems, also called NASAMS; HAWK air defense systems; Stinger anti-aircraft missiles; and Avenger air defense systems. 

In the same way the U.S. and partner nations have been training Ukrainian service members on the use of equipment such as howitzers and the F-16 Falcon aircraft, the Iranians have trained Russians on the use of the Fath 360. Ryder said the department believes "dozens" of Russian military personnel were trained in Iran to use the missile system. 

While it's not known what the Iranians received in exchange for providing the missiles. Ryder said officials speculate intelligence information might have been part of the arrangement. 

"Without being able to go into specifics, we see them sharing information as it relates to nuclear programs, space and other technological capabilities that Russia has that countries like Iran want," he said. 

Ryder also said given Russia's growing relationships with other bad-faith actors on the global stage, including North Korea, there is a reasonable expectation that there will be continued delivery of missiles from Iran. 

"The concerning aspect of this ... is the developing relationship between Russia and Iran," he said. "And you also see Russia developing a relationship with [North Korea], where they become essentially a supplier of capability. So, one has to assume that if Iran is providing Russia with these types of missiles, that it's very likely it would not be a one-time good deal, that this would be a source of capability that Russia would seek to tap in the future."

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