Levelt, Willem J. M. Other Research, MPI for Psycholinguistics, Max Planck Society;
Stapel_Investigation_Final_report.pdf (Publisher version), 1005KB
Eindrapport_Commissie_Levelt.pdf (Publisher version), 559KB
Levelt, W. J. M., Drenth, P., & Noort, E. (Eds.). (2012). Flawed science: The fraudulent research practices of social psychologist Diederik Stapel. Tilburg: Commissioned by the Tilburg University, University of Amsterdam and the University of Groningen.