Turnitin is an Internet-based plagiarism-prevention service.
"The color of the report icon indicates the Similarity Index of the paper, based on the amount of matching or similar text that was uncovered. The percentage range is 0% to 100% The possible similarity indices are:
Warning: These indices do not reflect Turnitin’s assessment of whether a paper has or has not been plagiarized. Originality Reports are simply a tool to help an instructor find sources that contain text similar to submitted papers. The decision to deem any work plagiarized must be made carefully, and only after in depth examination of both the submitted paper and suspect sources in accordance with the standards of the class and institution where the paper was submitted."-- (http://turnitin.com/en_us/training/instructor-training/about-originalitycheck)
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