Neuroskeptic has the details this amazing episode in the history of psychology.
Interestingly the responses of the Nazi leaders were used in an experiment that raised questions about the validity of the Rorschach procedure. Here is the abstract of the relevant paper:
“The Rorschach records of 17 Nazi war criminals (administered in 1946 by Kelley and Gilbert) were subjected to an experimental procedure wherein eight Nazi records and eight controls (matched for levels of mental health potential) were assessed blind by ten Rorschach experts. Multiple choice options allowed for classification on the basis of group characteristics or degree of potential. Nazi records were not identified as such; selection related to the cross-section of adjustment or inadequacy as reflected in both Nazi and control groups.”