Diederik Stapel is up to 54 retractions.
Here’s the notice from Self and Identity:
Schwinghammer, S. A., & Stapel, D. A. (2011). Measure by measure: When implicit and explicit social comparison effects differ. Self and Identity, 10, 166–173. DOI: 10.1080/15298861003680117.
The above named article has been retracted from publication in Self and Identity by agreement of the journal Editor, the Publisher and the Co-authors. The retraction has been agreed after the Noort Committee determined fraud in the publication. For further details, please visit the following link https://www.commissielevelt.nl/
The paper has been cited just once, according to Thomson Scientific’s Web of Knowledge, in a paper published this spring called “Attractiveness of Limited Edition Artwork for First Generation Newly Affluent Consumers.” It’s Stapel’s second retraction from Self and Identity.
Hat tip: Rolf Degen