Diederik Stapel has three more retractions, making 31.

The most recent three we’ve found all appear in the European Journal of Social Psychology:

The following article from the European Journal of Social Psychology, “It’s all in the timing: Measuring emotional reactions to stereotype threat before and after taking a test” by Marx, D. M., and Stapel, D. A., published online on 18 May 2006 in Wiley Online Library (wileyonlinelibrary.com), has been retracted by agreement between the first author, the journal Editor in Chief, Tom Postmes, and John Wiley and Sons Ltd. The retraction has been agreed upon following the results of an investigation into the work of Diederik A. Stapel (https://www.commissielevelt.nl/). The Levelt Committee has determined that there were strong indications that this article contained data that were fabricated by Diederik A. Stapel. The first author was unaware of his actions and not in any way involved. The following article from European Journal of Social Psychology, “When different is better: Performance following upward comparison” by Camille S. Johnson and Diederik A. Stapel, published online on 18 August 2006 in Wiley Online Library (wileyonlinelibrary.com), has been retracted by agreement between the co-author, the journal Editor in Chief, Tom Postmes, and John Wiley and Sons Ltd. The retraction has been agreed following the results of an investigation into the work of Diederik A. Stapel (https://www.commissielevelt.nl/). The Levelt Committee has determined that this article contained data that was fabricated by Diederik A. Stapel. His co-author was unaware of his actions, and not in any way involved. The following article from the European Journal of Social Psychology, “Staff, miter, book, share: how attributes of Saint Nicholas induce normative behavior” by Janneke F. Joly and Diederik A. Stapel, published online on 14 January 2008 in Wiley Online Library (wileyonlinelibrary.com), has been retracted by agreement between the co-author, the journal Editor in Chief, Tom Postmes, and John Wiley and Sons Ltd. The retraction has been agreed upon following the results of an investigation into the work of Diederik A. Stapel (https://www.commissielevelt.nl/). The Levelt Committee has determined that this article contained data that were fabricated by Diederik A. Stapel. His co-author was unaware of his actions and not in any way involved.

The papers have been 13 times, 9 times, and once, according to Thomson Scientific’s Web of Knowledge.

This makes six for Stapel in the journal, which has also issued an Expression of Concern about three other papers:

On the basis of the results of the Joint Tilburg/Groningen/Amsterdam investigation of the publications by Mr Stapel (https://www.commissielevelt.nl/), we are issuing this Expression of Concern for the articles listed to alert our readers. The Drenth Committee of Amsterdam has stated that “‘Evidence of fraud’ is based on an inspection and analysis of the reported data, leading to the conclusion that fraud is most likely.” According to the Drenth committee “In Mr Stapel’s memory, there is no question of fraudulent behavior during his Amsterdam period, and he does not agree with these findings of the Committee” (https://www.commissielevelt.nl/drenth-committee/evidence-of-fraud/). REFERENCES Stapel, D. A., & Koomen, W. (1996). Differential consequences of trait inferences: A direct test of the trait–referent hypothesis. European Journal of Social Psychology, 26, 827–837. DOI: 10.1002/(SICI)1099-0992(199609)26:5<827::AID-EJSP800>3.0.CO;2-X. Stapel, D. A., & Koomen, W. (1997). Using primed exemplars during impression formation: Interpretation or comparison? European Journal of Social Psychology, 27, 357–367. DOI: 10.1002/(SICI)1099-0992 (199705)27:3<357::AID-EJSP818>3.0.CO;2-E. Stapel, D. A., & Koomen, W. (1999). Correction processes in person judgments: The role of timing. European Journal of Social Psychology, 29, 131–138. DOI: 10.1002/(SICI)1099-0992(199902)29:1<131::AIDEJSP922>3.0.CO;2-8.

Hat tip: Rolf Degen

Share this: Email

Facebook

Twitter

