Brauer and Judd Manipulated Both the Number of Times That

Multiple Choice

Brauer and Judd manipulated both the number of times that participants heard others express their beliefs as well as the number of times the participants expressed their own beliefs. Which of the following did they find to be the best predictor of group polarization?

A) The number of times the participants expressed their own beliefs.
B) The number of times the participants heard their own beliefs expressed by others.
C) The length of time allotted for discussion.
D) The perceived extremity of the group norms.