Abstract
External plagiarism detection systems compare suspicious texts against a reference collection to identify the original one(s). The suspicious text may not contain a verbatim copy of the reference collection since plagiarists often try to disguise their behaviour by altering the text. For large reference collections, such as those accessible via the internet, it is not practical to compare the suspicious text with every document in the reference collection. Consequently many approaches to plagiarism detection begin by identifying a set of candidate documents from the reference collection. We report an IR-based approach to the candidate document selection problem that uses query expansion to identify candidates which have been altered. The reported system outperforms a previously reported approach and is also robust to changes in the reference collection text.
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Nawab, R.M.A., Stevenson, M., Clough, P. (2012). Retrieving Candidate Plagiarised Documents Using Query Expansion. In: Baeza-Yates, R., et al. Advances in Information Retrieval. ECIR 2012. Lecture Notes in Computer Science, vol 7224. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-28997-2_18
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DOI: https://doi.org/10.1007/978-3-642-28997-2_18
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