In One of the First Social Psychological Experiments Ever Conducted

In one of the first social psychological experiments ever conducted, researcher Max Ringlemann observed men as they pulled on a rope either alone, as part of a small group, or as part of a large group. He found that as the size of the group increased, ____.

A) individual effort increased
B) individual effort decreased
C) the task took longer to complete
D) the task took less time to complete