It was subjects' behavior on these 12 "critical trials" that formed the aim of the study: to test how many subjects would change their answer to conform to those of the 7 actors, despite it being wrong. Subjects were interviewed after the study including being debriefed about the true purpose of the study. These post-test interviews shed valuable light on the study: both because they revealed subjects often were "just going along" and because they revealed considerable individual differences to Asch.