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https://www.commissielevelt.nl/wp-content/uploads_per_blog/commissielevelt/2013/02/The-Psychologist.pdf (Ergänzendes Material)
Levelt_thepsychologist_0213lett.pdf (Verlagsversion), 55KB
Drenth, P., Levelt, W. J. M., & Noort, E. (2013). Rejoinder to commentary on the Stapel-fraud report. The Psychologist, 26(2), 81.