Fred Festinger died on April 25, 2011, in Porter Ranch, California, USA.
Fred Festinger was born on January 13, 1925, in USA.
Leon Festinger died on 1989-02-11.
Leon Festinger was born on 1919-05-08.
You say "Las obras de Leon Festinger".
Leon Festinger is credited with developing the theory of cognitive dissonance in the 1950s. This theory suggests that individuals experience discomfort when their beliefs or attitudes are inconsistent, leading them to seek ways to reduce this cognitive dissonance.
Fred and George do not both die only Fred dies.
No, he did not die.
Fred Hollow died on the 10 of February 1993, from cancer.
Fred Earle died in 1915.
Fred Haggar died in 1913.
Fred Goebel died in 1964.
Fred Csasznik died in 1985.