Ss were 84 college women given a dull preliminary task to perform. A peer (E's confederate) took the initiative in helping 1/3 of Ss on this task, while she supposedly was instructed by E to give aid in another 1/3 of the cases, and refused to help the remaining Ss. Following this, all Ss were led to believe that they were to be "workers" under the guidance of a "supervisor," represented to ½ of Ss as the same peer they had encountered earlier and to the other ½ as a different peer, and told that their supervisor's chances of winning a cash prize were highly dependent on how hard Ss worked. When the supervisor was the same person, Ss worked harder after receiving voluntary help than did Ss who received the compulsory help. Ss who had been refused prior help were least willing to work. Differences among the 3 help conditions for those Ss working for the different supervisor were not significant but the condition means were ordered in the same way. (PsycINFO Database Record (c) 2016 APA, all rights reserved)