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Overview Leon Festinger (1919-1989) was an American social psychologist who made significant contributions to the field of social comparison theory, cognitive dissonance theory, and group dynamics. He earned his PhD in psychology from the University of Michiga...

Definition Social Comparison Theory, developed by Leon Festinger in 1954, proposes that we evaluate our own opinions, abilities, and characteristics by comparing ourselves to others. This isn't necessarily a conscious process; it often happens automatically. T...

Definition Cognitive dissonance is a psychological concept that describes the mental discomfort or tension experienced by an individual who holds two or more contradictory beliefs, values, or ideas at the same time. This discomfort arises when there is a confl...