Leon Festinger is a Psychosociologue American born with New York in 1919 and died in 1989.

He is the author of the theory of the cognitive Dissonance ( has off theory cognitive dissonance , 1957) by which he tries to explain how the human being manages the tensions generated by incompatible information.

Leon Festinger worked out his concept of Dissonance cognitive following his study of a soucoupic Secte which believed that the end of the world was close and that the Extraterrestre S would come to seek them soon.

Publications

• Festinger, L., Riecken, H.W., & Schachter, S. (1956). When prophecy fails. Mineapolis: University off Minnesota Near.

• the failure of a prophecy of Leon Festinger, Hank Riecken, Stanley Schachter