Why is it I sometimes see fragmented matches pitted through some student’s work in Turnitin?

Turnitin will highlight these small ‘fragmented’ words when it has found similarity to a larger portion of text elsewhere within the student’s work from the same source, and the total of these result in an overall % which is deemed ‘significant’ enough by Turnitin to show.

Please be aware that Turnitin is best at matching larger, more verbatim sections of unoriginal text, it is not a paraphrasing detector. It would not indicate where a student may have paraphrased a series of small sections from multiple sources, then woven these together and not attributed them.

If you believe you may have seen a similar, although not verbatim, sentence / paragraph / phrase in a source which has not been attributed by the student, it may be that there is not an overall match to that source with the student’s work for Turnitin to highlight it. Using an Internet Search engine, such as Google, may help as these search on keywords.