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Plagiarism check

All doctoral dissertations are checked for plagiarism before they are submitted to the doctorate committee.

Plagiarism detection

The Leiden University doctorate regulations stipulate that all PhD dissertations need to be checked for plagiarism. A professional tool, iThenticate, is now available which is also used by scientific publishers.


When the PhD candidate has finished his/her dissertation, the supervisor sends the manuscript to the Institute’s key user (see scheme below). The key user uploads the dissertation in iThenticate and sends the plagiarism report by email to the supervisor. Subsequently, the supervisor checks the outcome of the plagiarism report, uploads the plagiarism report in Converis and declares (by placing a check mark in Converis) that “the dissertation has successfully passed a plagiarism detector and in every other respect meets the applicable code of conduct on academic practice”. The flowchart (on the right side of this page) shows the overall procedure.

Support and more information

For information about the interpretation of the plagiarism report, please check the FAQs iThenticate report (on the right side of this page). For more information and/or support, please contact your Institute’s key user. Further information about plagiarism and the correct handling of citations can be found in the plagiarism guidelines.

Key user(s) per institute

Institute  Key user
ACPA Rosalien van der Poel, Emma de Looij
LIAS Koen Berghuijs, Renée Muileboom
LUCAS Roelie Mol
LUCL Jurgen Lingen
LUIH Inge LigtvoetPam de Groot
LUIP Karineke Sombroek 
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