/ How to Check Plagiarism in Thesis?

How to Check Plagiarism in Thesis?

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Manish Jindal

March 11, 2024


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How to Check Plagiarism in Thesis?

Key Takeaways:

  • Plagiarism undermines academic integrity, has ethical and legal consequences, and can damage your reputation and career.
  • Plagiarism goes beyond copying, encompassing paraphrasing, self-plagiarism, and data plagiarism, even if unintentional.
  • Develop strong research skills, cite all sources properly, paraphrase effectively, and use reliable plagiarism checkers to prevent plagiarism.
  • Consider factors like database size, algorithm sophistication, and security when selecting a plagiarism checker.
  • While helpful for initial scans, free checkers might lack accuracy, depth, and security compared to paid options.

Writing a thesis is a monumental task, requiring extensive research, analysis, and critical thinking. However, amidst the rigorous process of crafting a thesis, there exists a looming threat – plagiarism.

Plagiarism, the act of presenting someone else’s ideas, words, or work as your own without proper acknowledgment, is a serious academic offense.

Therefore, it is crucial for researchers and scholars to understand how to identify and prevent plagiarism in their theses.

In this comprehensive guide, we will explore how to check plagiarism in thesis, its significance, causes, and, most importantly, methods to detect and avoid it.

What is Plagiarism in Thesis?

Plagiarism in a thesis refers to the unauthorised use or imitation of another person’s work, ideas, or words without proper citation or attribution.

This can manifest in various forms, including:

  • Direct copying: Word-for-word copying of text from another source without proper citation.
  • Paraphrasing without proper citation: Even if you rephrase someone else’s ideas, failing to acknowledge the source constitutes plagiarism.
  • Mosaic plagiarism: Combining uncited passages or ideas from different sources to create a new text.
  • Self-plagiarism: Using significant portions of your own previously published work without proper citation in your thesis.
  • Data or image plagiarism: Using data or visuals from other sources without proper attribution.

It’s important to understand that unintentional plagiarism can also occur due to inadequate referencing practices or poor paraphrasing skills.

Regardless of intent, plagiarism undermines the academic integrity of your work and can have serious consequences.

Why is it Important to Check for Plagiarism in a Thesis?

Ensuring the originality of a thesis is paramount for several reasons:

Academic Integrity: Plagiarism undermines the integrity of academic work and violates the principles of honesty and intellectual integrity.

Ethical Considerations: Properly crediting the sources of information demonstrates respect for the intellectual contributions of others.

Legal Implications: Plagiarism can lead to legal consequences, including copyright infringement and intellectual property disputes.

Avoiding Serious Consequences: Plagiarism can lead to severe repercussions, including failing your thesis, expulsion from your program, and damage to your academic reputation.

Ensuring Your Own Work’s Recognition: By ensuring originality, you claim full ownership of your research and its unique contribution to the field.

Scholarly Contribution: Original research and ideas drive progress in academia. Plagiarism stifles innovation and impedes the advancement of knowledge.

Causes of Plagiarism in a Thesis

Plagiarism in a thesis can stem from various causes, ranging from intentional deceit to unintentional oversight. Understanding these causes is crucial for both preventing plagiarism and fostering academic integrity.

Here are some of the primary reasons why plagiarism occurs in thesis writing:

  • Lack of Understanding: One of the most common causes of plagiarism is a lack of understanding of what constitutes plagiarism. Many students do not fully grasp the difference between proper citation and mere acknowledgment, or they might not understand the nuances of paraphrasing versus direct quoting.
  • Poor Time Management: Procrastination and poor time management can lead students to feel pressured as deadlines approach. This pressure can lead to the temptation to take shortcuts, such as copying and pasting material without proper citation, in order to meet submission deadlines.
  • Inadequate Research Skills: Students may lack the necessary research skills to effectively gather and synthesise information. This deficiency can result in over-reliance on source material without properly integrating or citing it within their thesis.
  • Cultural Differences: Academic conventions regarding plagiarism and citation can vary significantly from one culture to another. International students might be unfamiliar with the strict standards of academic integrity prevalent in their host countries, leading to unintentional plagiarism.
  • Fear of Failure: The high stakes associated with thesis submission, including the fear of not meeting academic expectations or achieving desired grades, can drive students to plagiarise in an attempt to secure their success by any means necessary.
  • Lack of Confidence: Students who doubt their own writing abilities or subject matter expertise might resort to plagiarism as a way to bolster their work with the authority of established experts, fearing that their original contributions are not sufficient.
  • Access to Resources: The vast availability of resources online can be a double-edged sword. While it provides students with access to a wealth of information, it also makes it easier to find and copy material without proper attribution.
  • Ambiguous Policies: Sometimes, institutions or departments may not have clear, well-communicated policies on plagiarism and academic integrity. This ambiguity can lead to misunderstandings about what is and isn’t allowed.
  • Pressure to Perform: The competitive nature of academic environments can put immense pressure on students to outperform their peers. This competition, coupled with personal ambitions or external expectations, can lead some to plagiarise in an effort to gain an edge.
  • Accidental Plagiarism: Finally, plagiarism can sometimes occur purely by accident, such as through careless note-taking, failing to track sources accurately, or misunderstanding citation requirements.

Addressing these causes requires a multifaceted approach, including better education on academic integrity, improved support for research and writing skills, clear communication of expectations and consequences, and fostering a culture that values originality and ethical scholarship.

How to Check Plagiarism in Thesis?

Detecting plagiarism in a thesis requires a systematic approach and the utilisation of specialised tools and techniques. Here’s how you can effectively check for plagiarism:

Online Plagiarism Detection Software

Numerous plagiarism detection software tools are available, each offering unique features and capabilities. Some of the best plagiarism detection software include:

Bytescare: Bytescare Plagiarism Checker is an academic tool designed to detect plagiarism in thesis documents. It scans documents against a vast database of scholarly articles, journals, and web sources, ensuring authenticity and compliance with academic standards.

Its precision in detecting similarities and potential plagiarism makes it an indispensable asset for students and researchers aiming to ensure their work is authentic and compliant with academic standards.

Turnitin – Renowned as the foremost tool for plagiarism detection in academic submissions such as assignments, theses, and dissertations, Turnitin is a subscription-based service.

It employs sophisticated algorithms to identify copied content, drawing from a vast database that includes approximately 65 billion web pages, 1 billion student papers, and 170 million academic articles and journals.

Plagiarism Checker X – This advanced detection tool for Windows supports seven languages and is invaluable for scrutinising theses, dissertations, assignments, and blog posts for plagiarism. It caters to both students and educators, offering a free basic version and a professional account starting at around $40.

Grammarly Plagiarism CheckerGrammarly is widely used for both plagiarism and grammar checking, serving millions of users. While it is a paid service, it offers a free trial, with various subscription plans available, including monthly, quarterly, and annual options.

Copyscape – As one of the premier plagiarism checking software, Copyscape offers both free and premium versions. The premium version delivers more comprehensive results and it can also examine offline content for plagiarism.

ProWritingAid – This software checks for plagiarism against billions of web pages, with pricing ranging from $10 for 10 checks to $200 for 1000 checks. Unlike other tools, it does not rely on a pre-existing database but instead searches a search engine index to detect plagiarism.

Plagiarisma – An online tool that supports over 190 languages, Plagiarisma offers both free and premium versions. A notable restriction is that it permits only three searches per day from a single IP address, with the free version featuring more limited capabilities than the premium one.

Quetext – This online tool for plagiarism detection is designed for both students and educators and comes in free and pro versions. The pro version allows for the examination of up to 50 pages, or approximately 25,000 words.

MOSS (Measure of Software Similarity) – It is widely recognised as MOSS, stands out as a specialised tool designed explicitly for identifying instances of plagiarism within programming code. Arguably the finest tool of its kind, MOSS excels in detecting copied or similar software codes and programs.

Originating from Stanford labs in 1994, MOSS has since become a staple in numerous educational and research settings for its ability to pinpoint similarities in coding projects.

SST Plagiarism Checker – Among the simplest of plagiarism detection tools, Small SEO Tools’ plagiarism checker is free to use and can check up to 1000 words at a time. However, it does not offer the advanced features found in other plagiarism detection tools.

Key Criteria for Selecting Plagiarism Detection Software for Your Thesis

This table outlines the key factors to consider when choosing a plagiarism detection software for checking a thesis, ensuring both originality and adherence to academic integrity.

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Accuracy and Reliability
Select software known for precise detection of exact matches and paraphrased content using advanced algorithms.
Database SizeOpt for tools that search through billions of sources, including academic publications and web pages, for comprehensive coverage.
Ease of UseChoose software with a user-friendly interface that simplifies uploading and analysing your thesis.
Detailed ReportingLook for software that provides in-depth plagiarism reports, highlighting similarity percentages and sources of matched content.
Confidentiality and SecurityEnsure the tool guarantees the security of your document, protecting it from unauthorised access or misuse.
CostConsider both free and paid options, evaluating the features offered against the price to find the best value.
Customer SupportPrioritise software with robust support, including tutorials, FAQs, and responsive help channels.
Integration with Academic StandardsThe software should align with academic standards, distinguishing between proper citations and potential plagiarism effectively.

Do Free Plagiarism Checkers Work Effectively?

Free plagiarism checkers can serve as useful tools for initial content scans, but their effectiveness is subject to various factors that can influence the accuracy and depth of plagiarism reports they generate.

Here’s an exploration of these factors, incorporating the specified terms:

Database Size and Coverage: The breadth of a content database is crucial for detecting plagiarism.

Free online plagiarism checkers often have smaller databases, limiting their search to fewer accessible sources compared to premium services. This restriction can lead to a less thorough search, increasing the risk of overlooking duplicate content or failing to identify the correct source of original content.

Algorithm Sophistication: The capability to detect different types of plagiarism, including direct copying and more subtle forms like paraphrasing, hinges on the sophistication of the checker’s algorithms.

Free tools may not always employ advanced algorithms, potentially compromising their ability to accurately determine the percentage of plagiarism or distinguish between original content and plagiarism by accident.

Depth of Analysis: While free services may identify basic instances of duplicate content, they often lack the comprehensive analysis provided by paid subscriptions.

This includes detailed plagiarism reports that highlight not just the level of plagiarism detected but also provide a list of sources where the suspected plagiarism was found, aiding in addressing plagiarism issues more effectively.

Security and Privacy: The security of the documents checked for plagiarism and the privacy of the user’s data are paramount.

Users of free plagiarism checker tools should be cautious, as some services might store uploaded content, raising concerns about the misuse of sensitive information or unwarranted accusations of plagiarism.

Accuracy: The accuracy of free plagiarism checkers can vary, with some tools offering reasonable precision for preliminary checks. However, they may struggle with false positives or miss instances of plagiarism, affecting their reliability for in-depth scrutiny or academic evaluations.

Updates and Maintenance: The effectiveness of plagiarism detection software also depends on regular updates to its algorithms and content database to keep pace with new sources and evolving types of plagiarism.

Free services may not receive the same level of ongoing development as those requiring a monthly subscription, potentially diminishing their effectiveness over time.

Additional Considerations: Free plagiarism tool for similarity detection often impose an upload limit, restricting the volume of content that can be checked at one time. This can be a significant limitation for users with extensive documents.

In contrast, a premium service typically offers higher or no upload limits, along with access to a more extensive content database and more detailed plagiarism reports, making it a more robust solution for users seeking to ensure the integrity of their work.

Steps to Avoid Plagiarism in Thesis

Preventing plagiarism requires conscientious effort and adherence to ethical writing practices. Here are some essential steps to avoid plagiarism in your thesis:

  1. Understand Citation Styles: Familiarise yourself with the citation style required by your academic institution (e.g., APA, MLA, Chicago). Learn the rules for citing various sources, including books, journal articles, and online resources.
  2. Take Detailed Notes: When conducting research, record all relevant information about your sources, including authors’ names, publication dates, and page numbers. This will facilitate accurate citation and referencing later on.
  3. Paraphrase Properly: When summarising or rephrasing ideas from sources, ensure that you express them in your own words while maintaining the original meaning. Always cite the source to credit the original author.
  4. Use Quotations Sparingly: Direct quotations should be used sparingly and only when necessary to preserve the original wording or convey a specific point. Enclose quotations in quotation marks and provide proper citation.
  5. Cite All Sources: Whenever you use someone else’s ideas, data, or words, whether directly or indirectly, cite the source to give credit to the original author. Failure to cite constitutes plagiarism.
  6. Check and Double-Check: Before submitting your thesis, meticulously review your writing to ensure that all sources are properly cited and referenced. Use plagiarism detection software to scan your document for potential matches.


Plagiarism significantly undermines the integrity of academic research, posing a challenge that demands ethical awareness, meticulousness, and the application of effective strategies.

To ensure a thesis is free from plagiarism, leveraging accurate plagiarism checkers is essential. These tools facilitate an accurate comparison process against billions of sources, identifying potential writing issues and similarities that may not be evident at first glance.

The advantages of a plagiarism checker include not just the detection of copied content but also the promotion of originality and the enhancement of scholarly work.

This convenient feature is indispensable in maintaining high standards of academic excellence, allowing researchers to contribute valuable, authentic insights to their fields.


How much plagiarism is acceptable in a thesis?

There is no universally accepted threshold for acceptable plagiarism in a thesis. However, most academic institutions have strict policies against plagiarism and expect all work to be original and properly attributed.

Even a small amount of plagiarism can have serious consequences, including rejection of the thesis or academic disciplinary action.

Can I check plagiarism for free?

Yes, several plagiarism detection tools offer free versions or limited trials for users to check their documents for plagiarism. However, free versions may have limitations in terms of functionality and the size of the document that can be scanned.

How do I check for plagiarism and correct it?

To check for plagiarism, use specialised plagiarism detection software to scan your document for similarities with online sources and academic databases. If plagiarism is detected, review the flagged passages, and either paraphrase them or provide proper citation to attribute the original source.

How to detect plagiarism?

Plagiarism can be detected by comparing a document against a database of existing literature and online sources to identify similarities in content. Plagiarism detection software uses algorithms to analyse text and generate reports indicating potential instances of plagiarism.

How to avoid plagiarism in thesis and research?

To avoid plagiarism, cite all sources used in your thesis, including ideas, data, and words, whether paraphrased or quoted. Use proper citation styles and formatting guidelines as prescribed by your academic institution.

Additionally, develop good research practices, such as taking detailed notes and conducting thorough literature reviews.

What is the impact of plagiarism in a thesis?

The impact of plagiarism in a thesis can be severe, including academic consequences such as rejection of the thesis, loss of credibility, and disciplinary action.

Plagiarism also undermines the integrity of academic research and erodes trust within the scholarly community, potentially damaging the reputation of both the individual scholar and the academic institution.

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