The "diffusion of responsibility" hypothesis as an explanation of helping behavior (or lack of same) is qualified by suggesting that the hypothesis applies only in non-interacting situations. It is hypothesized that interacting groups who are aware of a help-demanding situation actually focus the responsibility and, therefore, take action as a group more rapidly than will a non-interacting group. Evidence is gathered in a contrived help-demanding situation employing a 2x3 (sex X condition) in which three conditions--alone, non-interacting groups, and interacting groups--are used. The evidence substantiates the major hypothesis. Speculation is also presented concerning the relationship of the "alone" condition to the interacting and non-interacting groups. References are presented. (Author)