Stanley Schachter

Stanley Schachter (April 15, 1922 – June 7, 1997) was an American social psychologist whose research profoundly shaped understandings of emotion , social influence , and human motivation. Best known for developing the two-factor theory of emotion in collaboration with Jerome E. Singer—which proposes that emotional experiences result from physiological arousal combined with cognitive interpretation of that arousal—Schachter's work also advanced theories of cognitive dissonance , group conformity , affiliation under stress, and the psychological underpinnings of obesity and nicotine addiction.

Born in Flushing, Queens , New York, Schachter earned a B.S. in 1942 and an M.A. in psychology in 1944 from Yale University , followed by a Ph.D. in social psychology from the University of Michigan in 1949. During World War II , he contributed to psychological research at the U.S. Air Force's Aero-Medical Laboratory. His early career included a postdoctoral fellowship at MIT under Kurt Lewin in 1946 and a faculty position at the University of Minnesota from 1949 to 1954, where he conducted his seminal dissertation on conformity in informal groups, published as Social Pressures in Informal Groups in 1950.

In 1961, Schachter joined Columbia University as a professor of psychology, becoming the Robert Johnston Niven Professor of Social Psychology in 1966 and remaining there until his retirement as emeritus in 1992. At Columbia, he collaborated closely with Leon Festinger on cognitive dissonance theory, co-authoring When Prophecy Fails (1956), which examined how individuals resolve dissonant beliefs through behavioral changes. His affiliation studies, detailed in The Psychology of Affiliation (1959), demonstrated how fear drives people to seek others' company for emotional relief. Later research explored misattribution of arousal, the psychology of obesity in works like Emotion, Obesity and Crime (1971) and Obese Humans and Rats (1974), and nicotine addiction in a 1978 study linking it to weight control motives.

Schachter's contributions earned him election to the American Academy of Arts and Sciences in 1976 and the National Academy of Sciences in 1983, as well as the American Psychological Association's Distinguished Scientific Contribution Award. He died at age 75 in East Hampton, New York , after a battle with cancer, survived by his wife, Sophia Duckworth, whom he married in 1967, and their son, Elijah.

Stanley Schachter was born on April 15, 1922, in Flushing, Queens, New York, to Jewish immigrant parents of eastern European origin, Nathan and Anna Schachter. He grew up in the semi-rural environment of Flushing during his early years, which provided a backdrop for his developing curiosity about human behavior and influence.

Schachter pursued his undergraduate education at Yale University, where he initially majored in art history before shifting focus; he earned a B.S. in 1942. He continued at Yale for graduate study, obtaining an M.A. in psychology in 1944. During World War II, from 1944 to 1946, Schachter served in the U.S. Army Air Forces at the Aero-Medical Laboratory, conducting research on night vision under physiologist Walter Miles.

Following the war, in 1946, Schachter joined the Massachusetts Institute of Technology (MIT) to work under the influential social psychologist Kurt Lewin at the newly established Research Center for Group Dynamics, where he was exposed to innovative approaches to studying social influence and group processes. After Lewin's untimely death in 1947, the center relocated to the University of Michigan , where Schachter completed his doctoral training. He received his Ph.D. in psychology from the University of Michigan in 1949, with Leon Festinger as his dissertation advisor; his thesis examined pressures toward uniformity in small groups, focusing on conformity dynamics.