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• Saudi J Anaesth
• v.13(Suppl 1); 2019 Apr

Turnitin: Is it a text matching or plagiarism detection tool?

Sultan a. meo.

Department of Physiology, College of Medicine, King Saud University, Riyadh, Saudi Arabia

Muhammad Talha

1 Deanship of Scientific Research, King Saud University, Riyadh, Saudi Arabia

The institutional integrity constitutes the bases of scientific activity. The frequent incidences of similarity, plagiarism, and retraction cases created the space for frequent use of similarity and plagiarism detecting tools. Turnitin is software that identifies the matched material by checking the electronically submitted documents against its database of academic publications, internet, and previously submitted documents. Turnitin provides a “similarity index,” which does not mean plagiarism. The prevalence of plagiarism could not reduce tremendously in the presence of many paid and un-paid plagiarism detecting tools because of the assortment of reasons such as poor research and citation skills, language problems, underdeveloped academic skills, etc., This paper may provide an adequate feedback to the students, researchers, and faculty members in understanding the difference between similarity index and plagiarism.

Introduction

The mechanism of broadcasting the scientific knowledge has experienced paradigm shift. Research publications have become an essential component of an academic promotion, research grants, innovative ideas, institutional growth, and eventually the economic and country development. Because of the lack of knowledge of similarity and plagiarism and for achieving an additional professional targets scientific misconduct has been slinked in the academic institutes. The research misconduct defined as “fabrication, falsification or plagiarism in writing, reviewing, or in reporting the research results.”[ 1 ] Academic plagiarism is increasing globally, which is a serious threat on academic integrity. Institutional pressure to publish, inappropriate training in principled scientific writing, ignorance, misunderstanding, and lack of constitutional controls and clear policies to deal with scientific misconduct in academics have led to increase research misconduct.[ 2 ]

In 1997, an internet based tool called “Turnitin” was established by iParadigms LLC. The Turnitin parent company “iParadigms LLC” also recognized a similar software service for books, newspaper editors, and magazine called “iThenticate.” The other similar types of tools included “Turnitin Suite” “GradeMark,” and “PeerMark.” The popularity of Turnitin has been expanded in academic institutions throughout the world. Turnitin tool checks the contents of any documents for its association with original contents. It identifies the similarities to existing sources of the original contents of the documents. Its prime role is to evade the plagiarism and improve the integrity of the academic institutions.

High morals are equally important in medical and other disciplines. In biomedical research, ethics are very important where the element human is involved.[ 3 ] Similarly, in other disciplines such as natural Sciences[ 4 ] and Arts and Humanities, principled issues are addressed in terms of plagiarism. Plagiarism derives from the Latin word “plagiarius” that refers to abducting or kidnapping. Plagiarism is the presentation of the thoughts or work of another under own name,[ 5 ] whereas citing the titles of papers will be detected as a similarity such as book titles or bibliographies, references and quotes, common phrases and constructs, etc. Some well-known kinds of plagiarism are briefly defined in the Table 1 .[ 6 ]

Types of plagiarism

The researchers and students frequently visit the various search engines as research tools and think cutting and pasting as an easy way of conducting the research.[ 7 , 8 ] Knowingly or unknowingly, they do misconduct that ultimately damage the integrity of the individuals and institutions. In general, plagiarism is not intentional or deliberate cheating, e.g., it can be because of certain reasons such as lack of interest in the subject, lack of research skills, fear of failing, procrastination, and/or poor referencing skills.[ 9 , 10 ] Chaudhuri[ 11 ] defines the plagiarism as “an unfair use of somebody else's work without giving credit for it. It is necessary to cite and acknowledge the sources even if those ideas are paraphrased and re-written with different words.” The newly entered students to higher education are often faced with such problems because of unawareness about academic culture, environment, and dignity. Therefore, it creates a space between skills of the individuals and expectations of the institutions.[ 12 ] The possible reasons of plagiarism are elaborated in the Table 2 .

Why do researchers plagiarise?

The present paper highlights the pros and cons of an educational resource which is “electronic text matching tool” and the most widely used tool, Turnitin. The Gill Rowell dismisses the myth that Turnitin is a “plagiarism detection software and clarifies the contribution that Turnitin can and cannot make to the detection and prevention of plagiarism.” In this study, we explore the misconception which is calling Turnitin “a plagiarism detection software.” It will be quiet sensible to recall it as “a text-matching tool” that electronically checks the similar text of submitted material against web contents, its database of academic publication and earlier submitted documents.[ 13 ]

Plagiarism detection is an academic judgment, which is depending on plenty of factors, and only expert academicians can do this job. Turnitin or other similar software's produce “Originality Reports,” which is then interpreted by a person on the basis of the importance of the findings. Before creating the originality reports, bibliography, quoted material, and small matches (words or percentage) should be excluded. The interpretation of originality reports can be tricky depending on the expertise of the team member. For instance, it is not wise to simply rely on the percentage of similarity index 38%, human intervention is must to rule out the facts by thorough inspection of each single matching. For example, is it extracted from one source or gathered many small portions from different sources? Is it 38% extracted from methodology or discussion section? It is also relevant to see that all the matching portions are correctly cited to display the source.[ 13 ] Sometimes Turnitin matches your own (same) paper and shows the similarity index more than 90%; in this case, you have to analyze the originality report thoroughly by checking each and every single matched source. If it is verified that the matched source is your own paper itself, then this paper should be excluded from the originality report using given options. It is wise to select “no repository” option in “edit assignment settings” before creating new originality reports to avoid this problem. Using this option will not save the papers submitted to Turnitin database. The Table 3 presents various features of originality report, whereas Table 4 illustrates the color scheme with respect to percentages of similarity index.

Originality report

Interpreting results according to the originality report

Safe percentages

There are no sharply defined rules as all work will perhaps carry certain words from other sources. The percentage varies from university to university, however, a considerable percentage would be anything above 25% (Yellow, Orange, and Red). It is essential to understand that the “Similarity Index” is NOT a “plagiarism index”; there is no percentage that is characteristically “good” or “bad.” However, 0% (an authentic result) does not essentially mean that all is “OK” with the paper, and 75% (high similarity text) does not certainly mean that the researcher should flunk. Academic judgment (human intervention) is must to evaluate the originality report and to rule out the true plagiarism, if persists. The originality reports are solely tools to uncover potential sources of plagiarism or text, which could have been erroneously cited. There are a large number of uses for the Turnitin tool. Students frequently practice it to check the papers for missing citations, and faculties use the Turnitin to check the plagiarism in students' assignments, master/PhD theses, manuscripts, etc. If plagiarism suspected, better to discuss with concerned student, researcher, or faculty member first because researcher could be the victim of someone. Be a smart enough to look at the report and decide what is going on here? A hotchpotch of tips to avoid plagiarism is described in the Table 5 .

Ten tips to avoid the plagiarism using the Turnitin tool

It is essential to understand the difference between two elements – Similarity and Plagiarism. An example is incorporated to understand this dilemma. It is obvious from the Figure 1 that there are many words, abbreviations, names of the tests, diseases etc., one cannot change or paraphrase them and has to write the sentence/s as it is. In this case, the Turnitin shows 64% similarity index, which does not mean plagiarism. It means that 64% of your work is matched with already published work, this may include billions of pages available on internet, which does not qualify as plagiarism.

Example of an originality report presenting the similarity index

Clanton[ 14 ] argues that unless academic dishonesty is reasonably suspected, it is ethically problematic to necessitate submission through plagiarism detection services such as Turnitin because of multiple reasons. The plagiarism detection tools cannot identify each and every occurrence of plagiarism because their databases are not complete,[ 15 , 16 ] but these tools are increasing their capability for detecting and deterring plagiarism.

Scientific integrity is the main concern of the global research community. That is why many plagiarism prevention tools are introduced for the ease of researchers to check the originality of their work before publishing the document(s). Many ethical committees and code of ethics have been introduced to avoid plagiarism and deal with misconduct cases at institutional levels. Various universities and research institutes have established their rules and regulations to avoid the plagiarism and misconduct issues. Plagiarism prevention is essential to appropriately admit to the contributions and scientific inventions introduced by other persons. Honoring and crediting individual work who really deserve rather than misleading the persons who read it to wrongly consider that the work belongs to another individual. Therefore, it is pertinent for students, researchers, and faculty members to comprehend that the Turnitin is not a plagiarism detection tool, but it is a text matching tool that provides the similarity of the document/s with already published work, which is the foremost purpose of this paper. To avoid misconducts and its consequences, one should acknowledge the work of other persons appropriately by properly referencing and citing it.

Author's contributions

SAM: Writing and reviewing the manuscript, MT: Conceived, literature search, and writing and reviewing a draft.

Financial support and sponsorship

Conflicts of interest.

There are no conflicts of interest.

Acknowledgments

The authors are thankful to the College of Medicine Research Centre (CMRC) and Deanship of Scientific Research, King Saud University, Riyadh, Saudi Arabia for supporting the work.

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Turnitin: A staff guide to interpreting the Similarity Report

Introduction.

This guide describes what a similarity report shows and how to interpret matches highlighted on a student’s assignment submitted to Turnitin.

The similarity report is an effective way to:

• Check that online sources in an assignment have been properly cited and the text has not simply been copied without appropriate referencing.
• Help students as a formative learning tool around referencing and that you can use with your students to improve their skills.
• Identify collusion between students on their course and potentially from other institutions who use Turnitin in the UK.
• Ensure a level of equality and parity when checking the similarity of students’ work against the vast range of possible online sources.
• Deter students from plagiarising and encourage good academic practice.

It’s important to know that a simliarity match does not always means plagiarism . You will need to apply your academic judgment by understanding how the report works and what it shows.

The similarity report is best used in conjunction with other methods to prevent and detect plagiarism and as part of a co-ordinated approach to maintaining the academic integrity of students’ written work.

Turnitin guide:  Setting reasonable expectations for the Turnitin Similarity Score

How to interpret the Similarity Report

The similarity index percentage.

An overall percentage score (with colour code) is shown next to a student’s name under the Similarity column in the Assignment Inbox. This shows the total amount of matched text as a proportion of the assignment.

This ‘at a glance’ guide should not be used as a measure of plagiarism. Even a 1% score could potentially be plagiarised.

There is no ideal percentage to look for . Students’ work is bound to contain some words from other sources. The percentage will vary depending on the type and length of assignment and the requirements of the work involved .

Individual matches need to be investigated by opening the student’s paper and viewing the match overview and breakdown panel.

What does the Similarity Index percentage indicate?

A 100% match means the assignment has no original work . It has most probably been submitted previously to Turnitin . This can happen if the student is making a re-submission of their work and the file had already been submitted to the Turnitin database. It could be a student error and they submitted to another assignment area by mistake. It can also indicate collusion or copying an essay from another student, either in their class, from a previous year or another institution.

Types of frequently found ‘acceptable’ matched text.

There are certain types of matched text that Turnitin will find, which can be safely excluded or ignored with discretion. These matches will be included in the overall similarity score for a similarity report and be highlighted as a matches on a student’s paper.

These include:

• Quotations: Properly referenced quotations can be ignored. These can be excluded using the filter.
• References and Bibliography: Other students will have used the same references at some point and these will show up.
• Matching formats: e.g. the same essay title.
• Tables and Charts showing shared or copied data or statistics.
• Appendices may also have a large amount of matching text as other students may well have used the same sources.
• Small matches that form common phrases in a sentence or subject terminology will be detected. These can be removed using the small match filter.
• Paraphrasing text from a source will be highlighted even where words in the phrase have been changed.  If the source has been cited, it remains the academic judgment of the tutor to decide if the text has been suitably paraphrased.

Examples of common match patterns found on assignments.

Page last updated on September 20, 2023 by adambailey

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The Paper Lookup tool

The paper lookup tool is used to view basic submission details for your users.

The paper lookup tool is only available for customers using Turnitin via the browser or integrated with Canvas, Microsoft Teams, Moodle, or Sakai.

To access the paper lookup tool, select Paper Lookup from the side menu.

To find a paper you will need to know the PaperID and/or user’s full name. Enter either of these into the search bar and select Search .

PaperID/Submission ID search

If you are searching with the PaperID/Submission ID, you must include “oid:” before the ID. You can search for more than one paper by separating the IDs with a comma (,).

Searching with the PaperID/Submission ID is available for users accessing Turnitin through their browser as well as those integrating with the Turnitin CoreAPI.

How to find PaperID/Submission ID

In the classic report.

Alternatively, the URL of the report also contains the ID. It will begin “oid”.

Make a note of the PaperID for papers that you want to find quickly in the future.

In the new report

To find a PaperID (refered to as the 'Submission ID' in this version of the report), open the Similarity Report and select the information icon in the top right of the report.

The Submission ID will be displayed in a dropdown.

User’s name search

If you are searching with the user’s name, you must enter the first and last name exactly how it appears in Users area. This will find all the papers submitted by this user.

Paper lookup results

The following results are shown once a paper has been found:

• The paper title (the PaperID is included underneath the title.)
• The name of the individual who submitted the paper
• The paper’s similarity score
• The folder in which the paper is located
• The date the submission was added

Select the title of the paper to open the Similarity Report .

Select the download button to the right of the results to download the paper.

Select the trash icon to delete the paper.

This will not move the file to the trash where it can be retrieved later. This action will permanently delete the paper from Turnitin.

To return to the search, select Reset search results .

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Check for unintentional plagiarism

Easily check your paper for missing citations and accidental plagiarism with the EasyBib plagiarism checker. The EasyBib plagiarism checker:

• Scans your paper against billions of sources.
• Identifies text that may be flagged for plagiarism.
• Provides you with a plagiarism score.

You can submit your paper at any hour of the day and quickly receive a plagiarism report.

What is the EasyBib plagiarism checker? 

Most basic plagiarism checkers review your work and calculate a percentage, meaning how much of your writing is indicative of original work. But, the EasyBib plagiarism checker goes way beyond a simple percentage. Any text that could be categorized as potential plagiarism is highlighted, allowing you time to review each warning and determine how to adjust it or how to cite it correctly.

You’ll even see the sources against which your writing is compared and the actual word for word breakdown. If you determine that a warning is unnecessary, you can waive the plagiarism check suggestion.

Plagiarism is unethical because it doesn’t credit those who created the original work; it violates intellectual property and serves to benefit the perpetrator. It is a severe enough academic offense, that many faculty members use their own plagiarism checking tool for their students’ work. With the EasyBib Plagiarism checker, you can stay one step ahead of your professors and catch citation mistakes and accidental plagiarism before you submit your work for grading.

Why use a plagiarism checker? 

Imagine – it’s finals week and the final research paper of the semester is due in two days. You, being quite familiar with this high-stakes situation, hit the books, and pull together a ten-page, last-minute masterpiece using articles and materials from dozens of different sources.

However, in those late, coffee-fueled hours, are you fully confident that you correctly cited all the different sources you used? Are you sure you didn’t accidentally forget any? Are you confident that your teacher’s plagiarism tool will give your paper a 0% plagiarism score?

That’s where the EasyBib plagiarism checker comes in to save the day. One quick check can help you address all the above questions and put your mind at ease.

What exactly is plagiarism? 

Plagiarism has a number of possible definitions; it involves more than just copying someone else’s work. Improper citing, patchworking, and paraphrasing could all lead to plagiarism in one of your college assignments. Below are some common examples of accidental plagiarism that commonly occur.

Quoting or paraphrasing without citations

Not including in-text citations is another common type of accidental plagiarism. Quoting is taking verbatim text from a source. Paraphrasing is when you’re using another source to take the same idea but put it in your own words. In both cases, it’s important to always cite where those ideas are coming from. The EasyBib plagiarism checker can help alert you to when you need to accurately cite the sources you used.

Patchwork plagiarism

When writing a paper, you’re often sifting through multiple sources and tabs from different search engines. It’s easy to accidentally string together pieces of sentences and phrases into your own paragraphs. You may change a few words here and there, but it’s similar to the original text. Even though it’s accidental, it is still considered plagiarism. It’s important to clearly state when you’re using someone else’s words and work.

Improper citations

Depending on the class, professor, subject, or teacher, there are multiple correct citation styles and preferences. Some examples of common style guides that are followed for citations include MLA, APA, and Chicago style. When citing resources, it’s important to cite them accurately. Incorrect citations could make it impossible for a reader to track down a source and it’s considered plagiarism. There are EasyBib citation tools to help you do this.

Don’t fall victim to plagiarism pitfalls. Most of the time, you don’t even mean to commit plagiarism; rather, you’ve read so many sources from different search engines that it gets difficult to determine an original thought or well-stated fact versus someone else’s work. Or worse, you assume a statement is common knowledge, when in fact, it should be attributed to another author.

When in doubt, cite your source!

Time for a quick plagiarism quiz! 

Which of the following requires a citation?

• A chart or graph from another source
• A paraphrase of an original source
• Several sources’ ideas summarized into your own paragraph
• A direct quote
• All of the above

If you guessed option E than you’d be correct. Correct punctuation and citation of another individual’s ideas, quotes, and graphics are a pillar of good academic writing.

What if you copy your own previous writing?

Resubmitting your own original work for another class’s assignment is a form of self-plagiarism, so don’t cut corners in your writing. Draft an original piece for each class or ask your professor if you can incorporate your previous research.

What features are available with the EasyBib plagiarism checker? 

Along with providing warnings and sources for possible plagiarism, the EasyBib  plagiarism checker works alongside the other EasyBib tools, including a grammar checker  and a spell checker . You’ll receive personalized feedback on your thesis and writing structure too!

The  plagiarism checker compares your writing sample with billions of available sources online so that it detects plagiarism at every level. You’ll be notified of which phrases are too similar to current research and literature, prompting a possible rewrite or additional citation. You’ll also get feedback on your paper’s inconsistencies, such as changes in text, formatting, or style. These small details could suggest possible plagiarism within your assignment.

And speaking of citations, there are also  EasyBib citation tools  available. They help you quickly build your bibliography and avoid accidental plagiarism. Make sure you know which citation format your professor prefers!

Great! How do I start? 

Simply copy and paste or upload your essay into the checker at the top of this page. You’ll receive the first five grammar suggestions for free! To try the plagiarism checker for free, start your EasyBib Plus three-day free trial.* If you love the product and decide to opt for premium services, you’ll have access to unlimited writing suggestions and personalized feedback.

The EasyBib plagiarism checker is conveniently available 24 hours a day and seven days a week. You can cancel anytime.  Check your paper for free today!.

*See Terms and Conditions

Visit www.easybib.com for more information on helpful EasyBib writing and citing tools.

For informational guides and on writing and citing, visit the EasyBib guides homepage .

Why is a student paper self matching?

Apr 3, 2024 • knowledge article, information.

A similarity score of 100% indicates that Turnitin found 100% matching text to one or more sources stored in the Turnitin database. When the source of the match is another submitted paper, it is likely that the source is the student's own work. This may be defined as a self-match. If a student submits the same paper to multiple assignments in the same class , those submissions will not match each other thanks to the default self match exclusion. This is to allow users to make draft submissions without papers matching themselves. The self-match will show up in the "exclude sources" section of the Similarity Report and can easily be re-added to the report by following the steps in this guide below: Viewing excluded sources However, a self-match can occur when a student submits the same paper to assignments in different classes where at least one of the assignments is set to save papers to the repository. This is because papers submitted to different classes are not automatically excluded as self matches. If required, instructors can exclude any self-match by following the guidance below: Excluding sources Note: Deleting a paper from the assignment inbox does not remove it from the Turnitin database. Therefore, a paper deleted from an assignment may still come up as a 100% matching source on another paper's Similarity Report.

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What you can do with Turnitin Similarity

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High-quality, comprehensive similarity detection helps maintain your institution’s reputation.

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Make plagiarism a teachable moment by showing students how to maintain integrity in their work.

Integrate into existing workflows

Seamlessly integrate the industry’s top similarity checking tool into your learning management system.

Features Overview

Turnitin Similarity helps students and educators identify plagiarism while teaching students the importance of original work.

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Compare student work against our industry-leading database of 47 Billion current and archived Internet pages, 1.9 Billion student papers, and over 190 million articles, from the top 97% of publications

Similarity Report

View an assignment’s similarity score, get color-coded results and side-by-side comparisons to sources. Exclude any unnecessary matches.

Flags panel

See when a student has replaced or hidden characters, or otherwise manipulated text in their assignments to try to circumvent plagiarism checks.

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Turnitin Similarity integrates with all the top learning management systems, collaboration tools, and single-sign-on services.

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How can i access paperpal’s plagiarism check, how many pages or words can i check per month, will my unused quota transfer to the next month, what software is being used to detect similarity, what database is my writing checked against, how do i interpret the similarity score, why did i get a high similarity score after polishing language with paperpal using copilot’s ai-generated text, can paperpal ensure that my content is not flagged by plagiarism or ai detection tools, my paper is completely original. why is my similarity score so high, what types of documents can i upload, are my documents stored and added to turnitin’s database, understand plagiarism and ethical writing.

Want to master the basics of plagiarism and learn how to use AI tools responsibly? Check out these curated articles on plagiarism and ethical academic writing guidelines!

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