Diederik Stapel is up to 49 retractions.
Here are the latest three, from Personality and Social Psychology Bulletin:
The following three articles have been retracted from Personality and Social Psychology Bulletin by the Society for Personality and Social Psychology, the Editor, and the publisher of the journal:
Renkema, L.J, Stapel, D.A., Maringer, M. & van Yperen, N.W. (2008). Terror management and stereotyping: Why do people stereotype when mortality is salient? Personality and Social Psychology Bulletin, 34(4), 553-564. (Original DOI: 10.1177/0146167207312465)
Stapel, D.A., & Marx, D.M. (2007). Distinctiveness is key: How different types of self-other similarity moderate social comparison effects. Personality and Social Psychology Bulletin, 33(3), 439-448. (Original DOI: 10.1177/0146167206296105)
Stapel, D.A., & Koomen, W. (2001). When we wonder what it all means: Interpretation goals facilitate accessibility and stereotyping effects. Personality and Social Psychology Bulletin, 27(8), 915-929. (Original DOI: 10.1177/0146167201278001)
The papers have been cited 12, 6, and 7 times, respectively, according to Thomson Scientific’s Web of Knowledge.
The notice itself is behind a paywall:
These retraction decisions were made following the findings of an investigation into the work of author Diederik A. Stapel conducted by Tilburg University, the University of Amsterdam, and the University of Groningen (https://www.commissielevelt.nl/). The investigation of Stapel’s work was performed by three committees, the Levelt, Noort, and Drenth. Their findings determined that the first two articles contained fraudulent data supplied by Diederik Stapel. The investigation found likely evidence of fraud in the third article. Diederik A. Stapel’s co-authors on these papers were unaware of his actions, and were not in any way involved in the generation of the fraudulent data.
For other articles retracted as a result of these investigations, see the statement titled “Retraction of ‘The influence of mood on attribution,’ ‘Affects of the unexpected: When inconsistency feels good (or bad),’ ‘Why people stereotype affects how they stereotype: The differential influence of comprehension goals and self-enhancement goals on stereotyping,’ ‘Silence and table manners: When environments activate norms,’ and ‘Event accessibility and context effects in causal inference: Judgment of a different order’” in the October 2012 issue of PSPB, DOI: 10.1177/0146167212462821.
As a commenter pointed out on our last post about Stapel, the count is likely to rise to about 65.