Context:
Charges of data manipulation[edit]
After an investigation of the test, Australian psychologist Gina Perry[19] claimed that Milgram had manipulated his results. "Overall, over half disobeyed," said Ms Perry. Of those that obeyed, there were on one occasion many more than four
promptings, but 26 times before doing it.[20] Several times in fact some subjects asked to swap places with the learner. Gina Perry further claims that some subjects thought it was not real but a reality TV show.[21][22]
The full context is here:
http://en.wikipedia.org/wiki/Milgram_experiment