Overview of the 4th International Competition on Plagiarism Detection

This paper overviews 15 plagiarism detectors that have been evaluated within the fourth international competition on plagiarism detection at PAN’12. We report on their performances for two sub-tasks of external plagiarism detection: candidate document retrieval and detailed document comparison. Furthermore, we introduce the PAN plagiarism corpus 2012, the TIRA experimentation platform, and the ChatNoir search engine for the ClueWeb. They add scale and realism to the evaluation as well as new means of measuring performance. Pamela Forner, Jussi Karlgren, and Christa Womser-Hacker (Eds.): CLEF 2012 Evaluation Labs and Workshop – Working Notes Papers, 17-20 September, Rome, Italy. ISBN 978-88-904810-3-1. ISSN 2038-4963. 2012.