Irving L Janis Views
Born in Chicago, Illinois, he first reported the sleeper effect after studying the effects of the Frank Capra propaganda film Why We Fight on soldiers while at the Army. In later studies on this subject, Hovland collaborated with Irving Janis who would later become famous for his theory of groupthink.
A summary of the research developments and theoretical ideas that have grown out of Hovland's pioneering projects is presented in a comprehensive chapter by Irving L. Janis and M. Brewster Smith in Herbert C. Kelman, ed., International Behavior (1965). Hovland's work is also discussed in Arthur R. Cohen, Attitude Change and Social Influence (1964).
Irving Lester Janis (26 May 1918 - 15 November 1990) was a research psychologist at Yale University and a professor emeritus at the University of California, Berkeley most famous for his theory of groupthink which described the systematic errors made by groups when taking collective decisions. He retired in 1986.
Groupthink, a term coined by social psychologist Irving Janis (1972), occurs when a group makes faulty decisions because group pressures lead to a deterioration of