LEWIN'S APPROACH TO PERSONALITY Lewin emphasized the explanation of human behavior in terms of the forces and tensions that move us to action. Unlike Wertheimer, Kohler, and Koffka, who started with perception and then moved to behavior, Lewin began with behavior and what produces it, and then moved on to the problems of how people perceived their own and others' behavior. When a perceptual set (described below) affected the way learned associations were expressed, Lewin saw it as conflict between competing determining tendencies. In both laboratory and world, he held, a person's behavior is always oriented toward some goal. The person is always trying to do something. That intention or determining tendency is what matters most. Associations , held Lewin, are not sources of energy,but just links or connections "like the couplings between the cars of railroad train which do nothing except transmit the energy supplied by the locomotive." (Woodworth, 1964) Lewin declared, "Psychology cannot try to
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