Answered By: Marie Chezka Tamayo
Last Updated: Mar 10, 2025     Views: 3

  • Turnitin compares a user's work against its vast database. If any matching or similar content is found, it will be flagged in the match overview.
  • The database includes billions of web pages (current and archived), previously submitted student papers, and scholarly publications, including journals and periodicals.
  • The similarity score color in your simreport reflects the amount of matching text in a document.
  • The percentage range is 0% to 100%, with the following similarity groupings:


    Similarity Scoring Scenarios
    A high similarity score does not always suggest that a piece of writing has been plagiarized, just as a low similarity score does not always indicate that no plagiarism has occurred. Consider the following scenarios:

    1. Large Document Submission: A document of considerable size may show a 0% similarity score, even if matches exist. This happens because the similarity score is rounded to 0%, rather than being exactly 0%.

    2. Multiple Draft Submissions: If you submit several drafts of the same paper, the final draft may show a 100% similarity score. To avoid this, we advise to submit only the final draft of your paper or request the deletion of your previous submissions.

    3. Shared Document: [1] If someone submitted your paper on your behalf or [2] if you are working with a group and all your group members submitted the same paper, submitting the final draft later will result in a 100% similarity score. To prevent this from happening, your and all group members must request the deletion of the previous submissions.
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