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Turnitin (stylized as turnitin) is an Internet-based similarity detection service run by the American company Turnitin, LLC, a subsidiary of Advance Publications. Founded in 1998, it sells its licenses to universities and high schools who then use the software as a service (SaaS) website to check submitted documents against its database and the ...
A study was conducted to test the effectiveness of similarity detection software in a higher education setting. One part of the study assigned one group of students to write a paper. These students were first educated about plagiarism and informed that their work was to be run through a content similarity detection system.
Almost 5,000 middle and high schools use Turnitin, including 56 percent of the top 100 high schools (U.S. News and World Report's America's Best High Schools). [ 4 ] In Colorado, Turnitin is used by 100 schools—both secondary and higher education—and more than 200,000 students.
At off-peak hours for Turnitin, they could run full reports of every single article on English Wikipedia. The reports would detail which parts of Wikipedia articles matched web content, proprietary content, and, if desired, prior submissions to Turnitin. The reports would identify which external source positively overlapped for each match.
The program allegedly reported a 0.96% [13] match when run by the Spanish Government, however those figures were later corrected by PlagScan CEO, Markus Goldbach to be 21% with the default configuration. Rival software TurnItIn had reported a rate of plagiarism of 15%, several times more than that reported by Spanish Government using PlagScan.
The test statistic R is calculated in the following way: R = r B − r W M / 2 {\displaystyle R={\frac {r_{B}-r_{W}}{M/2}}} where r B is the average of rank similarities of pairs of samples (or replicates) originating from different sites, r W is the average of rank similarity of pairs among replicates within sites, and M = n ( n − 1)/2 where ...
Turnitin serves more than 30 million students worldwide across over 10,000 institutions in 135 countries, and has been utilized by over 1.6 million instructors. [81] When evaluating an article, Turnitin provides both formative and summative assessments.
The similarity of two strings and is determined by this formula: twice the number of matching characters divided by the total number of characters of both strings. The matching characters are defined as some longest common substring [3] plus recursively the number of matching characters in the non-matching regions on both sides of the longest common substring: [2] [4]