A 2-phase experiment on conformity process was conducted with 76 women and 36 men. In same-sex groups, Ss were presented with 1 of 3 conditions of prior group support before confronting erroneous judgments apparently given by 4 other group members. In the 1st phase, Ss responded to an unambiguous stimulus for 20 trials as the 1st person to report in a standard Crutchfield situation. The 3 support conditions involved uniform agreement from the group on 20 out of 20 trials, 14 out of 20 trials, or 10 out of 20 trials; a control condition had no feedback from others. Ss then shifted to the usual last response position for 20 more trials on which it now appeared that the other group members were responding directly opposite to accurate perception of the same unambiguous stimulus. Initial and sequential conformity were found to differ significantly as a function of the 4 treatments. As predicted, total conformity and a postinteraction measure of dependence were significantly correlated. Sex differences in total conformity were also noted, with the women being significantly higher overall. (PsycINFO Database Record (c) 2016 APA, all rights reserved)