Lewin, Kurt lo͞o´ĭn [key], 1890–1947, American psychologist, b. Germany, Ph.D. Univ. of Berlin, 1914. He taught at the Univ. of Berlin before coming to the United States in 1932. He was professor (1935–44) of child psychology at the Univ. of Iowa and director (from 1944) of the research center for group dynamics at the Massachusetts Institute of Technology. Influenced by Gestalt psychology, he was concerned with problems of motivation of individuals and of groups as determined by the context of a given situation. His work opened up a new realm of psychological investigation. His writings include A Dynamic Theory of Personality (tr. 1935), Principles of Topological Psychology (1936), The Conceptual Representation and Measurement of Psychological Forces (1938), and Resolving Social Conflicts (1947).
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