THE EFFECT OF FORCE CRITERION AND VARIABLE INTERVAL SCHEDULE ON THE RATE, DURATION, AND PEAK FORCE OF RESPONSE DURING FINAL PERFORMANCE AND EXTINCTION IN RATS.
Item
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Title
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THE EFFECT OF FORCE CRITERION AND VARIABLE INTERVAL SCHEDULE ON THE RATE, DURATION, AND PEAK FORCE OF RESPONSE DURING FINAL PERFORMANCE AND EXTINCTION IN RATS.
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Identifier
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AAI8409380
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identifier
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8409380
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Creator
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BARBER, NED G.
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Contributor
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Donald E. Mintz
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Date
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1984
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Language
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English
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Publisher
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City University of New York.
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Subject
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Psychology, Psychobiology
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Abstract
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The peak force of bar pressing emitted by rats has been shown to be differentiable by the imposition of elevated force criteria. Following the onset of extinction, response force has been found to increase and then decrease rapidly to a low level in a manner similar to response rate. The effect of two conditioning parameters, the level of the force criterion, and the amount of training undergone, on the emission of forces during extinction has never been methodically investigated.;Nine groups of rats were trained to press a manipulandum with either 5, 15, or 25 grams of force in order to receive reinforcement. Three of the groups were run under CRF and a force criterion. The remaining six groups were run under a concurrent force criterion/VI schedule (VI 15, 30, 60) to provide for variation in the amount of responding that would be experienced during conditioning. Following conditioning, extinction was run for 10 days.;After conditioning the median peak forces for the 5g and 15g groups was found to above the level of the criterion they were trained with. The 25g groups were emitting forces close to but slightly below their criterion level. Following the onset of extinction, the forces increased for all groups, with the largest increases shown by the CRF groups. The groups with low force criteria tended to exhibit larger increases in force at the onset of extinction. The tendency of the forces to decrease over the course of extinction was observed, but the rate of decrease appeared to be directly related to the level of force learned during training and to some degree inversely related to the schedule in effect during training.
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Type
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dissertation
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Source
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PQT Legacy CUNY.xlsx
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degree
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Ph.D.
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Program
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Psychology
