Diederik Stapel retraction count updated to 57
We’ve learned about two more retractions we missed for Diederick Stapel, the Dutch social psychology researcher who has now racked up a total of 57 retractions by our count. Both retractions were issued after a committee released a report which established fraud in dozens of papers co-authored by Stapel. Stapel is still #4 on our leaderboard.