Turnitin is a proprietary internet-based plagiarism detection system developed by iParadigms, LLC. Turnitin is mainly designed to make comparisons between texts contained within a document against three standard paper repositories, namely, student paper repository, current and archived internet and periodicals, journals and publications.
When the text is compared, a percentage similarity index which is also matched to a colour code is generated. The colour codes and indices are:
Blue no matching text
Green one to 24% matching text
Yellow 25 to 49% matching text
Orange 50 to 74% matching text
Red 75 to 100% matching text
Take note that this is only an indication that plagiarism might have occurred. The text which matches other documents is highlighted and numbered. The numbering will correspond to the original sites and documents where the material was extracted.
The level of sensitivity and method of extracting text is not best suited to mathematical formula or code. Mathematical formula can be added to a document using a verity of different methods and because of this it is difficult to compare. Code in its raw text form is able to be compared but because of the nature of code and the way that it contains many repeating terms the originality may point out matches that are not relevant. But generally code in .txt format can be submitted and compared prior to being compiled.
Turnitin provides a faster way of electronically checking documents and encourages correct citation of other people’s material.
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