Same here. I had to downgrade all my beliefs which were based on hard psychology textbooks. I was hardly aware of such prevalence of scientific fraud, in the field of psychology. On a side note, what about the psychological studies oft quoted in the sequences? How much can they be trusted?
Came across this article, published in 1991 but hardly dated:
David T. Lykken, What's Wrong With Psychology, Anyway? (PDF, 39 pages)
Anyone who's interested in psychology as a science might, I think, find it fascinating. Lots of stuff there about rationality-related failures of academic psychology. Several wonderful anecdotes, of which I'll quote one in full that had me laughing out loud --
(I came across the reference to the article in the HN discussion about a project, of independent interest, to try and replicate a sample of articles from three reputable journals in psychology in a given year)