Drive Reduction Theory

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Clark Hull (1884 - 1952) Drive Reduction Theory Clark Hull did his undergraduate work at University of Michigan (1913) and later earned his Ph.D. from the University of Wisconsin in 1918. He spent most of his professional career at the Institute of Psychology at Yale University (1929 until his death in 1952). At the age of 24 he contracted polio and suffered disabilities as a result of it. Theory Major influences on Hull's thinking included the work of Pavlov, Darwin, Thorndike and Tolman. His theory was an attempt to create a synthesis of the theories of these researchers plus Newtonian physics. He became interested in hypnosis, and wrote a book entitled Hypnosis and Suggestibility in 1933. During the 1940's and 1950's Hull's work was much-cited in the psychological literature. He is best known for his Drive Reduction Theory which postulated that behaviour occurs in response to "drives" such as hunger, thirst, sexual interest, feeling cold, etc. When the goal of the drive is attained (food, water, mating, warmth) the drive is reduced, at least temporarily. This reduction of drive serves as a reinforces for learning. Thus learning involves a dynamic interplay between survival drives and their attainment. The bonding of the drive with the goal of the drive was a type of reinforcement, and his theory was a reinforcement theory of learning. Hull believed that these drives and behaviours to fulfil the drives were influential in the evolutionary process as described by Darwin. Movement sequences lead to need reduction as survival adaptations. He assumed that learning could only occur with reinforcement of the responses that lead to meeting of survival needs, and that the mechanism of this reinforcement was the reduction of a biological drive. Hull was only interested in operational descriptions of what was observable. He did not deny cognitive
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