Turnitin duplicate checking rule is that the similarity rate of the whole duplicate checking report is accumulated by the repetition rate of each single matching source. For example, a paper with a similarity of 20% may consist of 20 sources, that is, each group of texts has 1% repetition. Similarity given by CrossCheck database after duplicate checking of SCI papers.

Usually, each matching source only accounts for 1%~3% similarity, which is within the reasonable range allowed by the journal. The results of this duplicate check have little effect on identifying whether the paper is plagiarized or not, and can be almost ignored.

data analysis

1, the similarity rate is between 10% and 50%-possible problems (brief review). Most authors' report duplicate checking results may be within this range, which is a relatively moderate percentage. In this range, there may be some directly extracted words. At this time, judging whether an article is plagiarized depends on the similarity of a single matching source. Because the total repetition rate of the article is high, it is possible that only a certain part has an unusually high repetition rate. In this case, we should focus on rewriting the parts with high repetition.

2. Similarity rate is higher than 50%-possible problems (careful examination) indicate that there is a high degree of duplication in one or more single matching sources, that is, large sentences are consistent with some documents in the database, which requires vigilance. At this time, there is a high probability that it will be judged as plagiarism. This language must be reevaluated and carefully rewritten.