"Leon Festinger (8 May 1919 \u2013 11 February 1989) was an American social psychologist, perhaps best known for cognitive dissonance and social comparison theory. His theories and research are credited with repudiating the previously dominant behaviorist view of social psychology by demonstrating the inadequacy of stimulus-response conditioning accounts of human behavior."@en . "1919Z"^^ . "American psychologist" . . "1989-02-11Z"^^ . "1919-05-08Z"^^ . . "Festinger, Leon"@en . . . "Leon Festinger"@en . . . . . "1989Z"^^ . . .