OK, this may be what was described in 651.
The participants in the test weren't shocked at different levels but were led to believe they administered shocks at different levels. 65% of the participants (26 of 40) shocked their victims unto death (or so they were led to believe).
"Milgram maintained that a followup
questionnaire showed that 84 percent of the subjects were glad to have been
involved, 15 percent were neutral and only 1.3 percent were sorry or had
negative feelings."
Thats pretty weak evidence, I know.
Can anyone help me find more?