Leon Festinger

 (8 May 1919 – 11 February 1989) was an American social psychologist, perhaps best known for cognitive dissonance and.

Quotes

 * When there is a range of opinion in the group, communications tend to be directed towards those members whose opinions are at the extremes of the range.
 * Leon Festinger and John Thibaut. "Interpersonal communication in small groups." The Journal of Abnormal and Social Psychology 46.1 (1951): 92.