Subjective certainty and resistance to change.

"Ss were led to believe that they were exchanging numbered counters with one another, through a messenger, to the end that all six members could achieve simultaneous solutions to a problem… . The crucial determination was whether or not S would break his own solution to yield to a simulated request from another group member for one of the numbers he was using… . evidence is used to support an interpretation of yielding to group pressure which takes account of Ss' perceptual modes of organizing complex, ambiguous situations." (PsycINFO Database Record (c) 2010 APA, all rights reserved)