Abstract
Consummatory contrast was investigated in food-deprived and nondeprived rats over repeated shifts from 32% to 4% sucrose. Repeated negative contrast was obtained across five downshifts, enduring in nondeprived subjects and tending to diminish in deprived subjects. Positive contrast was obtained with deprived subjects in the first upshift only but was not apparent with nondeprived subjects. In a second phase, deprivation conditions were reversed and subjects displayed patterns of negative contrast appropriate to the current deprivation condition, regardless of prior deprivation. Positive contrast was not obtained with formerly nondeprived subjects or when all subjects were on ad lib feeding, but reemerged when formerly deprived subjects were returned to a deprived state. The results are discussed in terms of the interaction of deprivation with the conflict mechanisms or the learned responses involved in contrast.
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Portions of this study were conducted in partial fulfillment of the requirements for the degree of Doctor of Philosophy at Tulane University, New Orleans, Louisiana.
The author acknowledges the assistance of Lawrence W. Dachowski, Department of Psychology, Tulane University, in the supervision and direction of this project.
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Brazier, M.M. Effects of Present and Former Deprivation on Consummatory Contrast. Psychol Rec 46, 187–200 (1996). https://doi.org/10.1007/BF03395171
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DOI: https://doi.org/10.1007/BF03395171