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www.le.ac.uk
How effective are electronic plagiarism detection systems and does it matter how you use them?
4th International Plagiarism Conference 23 June 2010
Dr Jo Badge (@jobadge)School of Biological SciencesUniversity of Leicester
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http://bit.ly/eDetection
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Electronic Detection Systems
• Software to automatically search for non-original text
• dynamic list of software online [link]
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Plagiarism detection services
Turnitin CopyCatch
SafeAssign
WCopyFind
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Effectiveness
• Cross comparison reviews mostly focus on usability
• Live testing with scoring for detection rates carried out by Debora Weber-Wuff– Rates Safeassign above Turnitin in terms
of detection rates
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Mode of use: prevention
1. Long term effects
2. Risk / benefit perceptions
3. Punishment as education
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1. Long term effects : Culwin, 2006
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Deterrent : Badge, 2007
Detection rate/ %
pilot 2.06 Year 1
2.73
Year 2
0.94
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2. Risk / benefit perceptions : Woessner 2004
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3. Punishment as education
• Punitive tutor-supported access
• Students shown originality report prior to penalty
• Most common but least studied
• Form of student access to originality reports
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Mode of use: student access
1.Punitive supported access
2.Outside institutional systems
3.Institutional open access
4.Tutor supported access
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2. Outside institutional systems
first: spelling check; second: grammar check; third: originality check
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3. Institutional open access
Still fairly rare in UK
• IFS
• York (controlled training session trial)
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Braumoeller & Gaines, 2001
• Marked on grading curve
• Feedback on effect of plagiarism on grades
Assignment 1
Plagiarised papers
Assignment 2
Plagiarised papers
Politics 100 C (n=78) 10 1Politics 100 D(n=73) 9 0
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4. Tutor supported accessLedwith & Risquez, 2008
Proportion of matching text for both assignments submitted through Turnitin
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Ledwith & Risquez, 2008
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Barrett & Malcolm, 2006
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Davis & Carroll, 2009
Reduction in– Amount of plagiarism (45.5%)– Over-reliance on one source (45.5%)– Citation errors (62%)– Insufficient paraphrasing (38%)
Percentages= total final drafts showing reduction where n=66 (over 3 years 2007-
2009)
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AcknowledgementsHigher Education Academy
University of Leicester Teaching Enhancement Forum
GENIE CETL
Dr Nadya Yakovchuk
Dr Jon Scott