YSK: the Dunning-Kruger effect is controversial because it’s part of psychology’s repeatability problem.

Other famous psychology experiments like the ‘Stanford prison experiment’ or the ‘Milgram experiment’ fail to show what you learned in psych101. The prison experiment was so flawed as to be useless, and variations on the Milgram experiment show the opposite effect from the original.

For those familiar with the Milgram experiment: one variation of the study saw the “scientist” running the test replaced with a policeman or a military officer. In these circumstances, almost everybody refused to use high voltage.