This experiment was designed to test the motivation to perform a task for males and females in mixed and same-sex groups. Individuals in homogeneous groups (four males or four females) or heterogeneous groups (two males and two females) clapped their hands alone, in pairs and in foursomes. People exerted more effort alone than in groups,…

For some time, cultural anthropologists have attempted to explain regularities of behavior in large groups (nations, tribes, etc.) through a series of studies generally known as "national character" or "modal personality" studies. The investigation reported here attempts to adapt the "modal personality" approach to…