What happened when the world's most no-nonsense psychologist took a Rorschach test?
A fun little paper reports on B. F. Skinner's Rorschach results. He agreed to be tested as part of a 1953 project psychoanalysing various eminent scientists. The scientists were anonymous at the time but now Norwegians Cato Grønnerød et al have dug them out of the archives (Skinner has been dead since 1990).
Skinner was the world's leading exponent of behaviourism, a school of thought that held roughly that [strike]it's impossible to know anything about "inner" mental states or thoughts, and that they might not even exist, so all we could do was look at and try to predict behaviour [/strike]
(edit: see comments for clarification).
It was never an especially convincing idea to be honest and behaviourism is now pretty much dead although many of the techniques pioneered by Skinner live on in the form of tests ...