Which Observation by Norman Triplett Led to the Birth of Social

Multiple Choice

Which observation by Norman Triplett led to the birth of social psychology?

A) People who are more attractive tend to make more money.
B) People who smile more are generally regarded as more attractive.
C) Bicyclists ride faster when in a group with other bicyclists.
D) People are less likely to help a stranger in need when other people who could also potentially help are around.