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The interaction of conditioned taste aversions and schedule-induced polydipsia: Effects of repeated conditioning trials |
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| Authors: | Anthony L Riley Richard L Hyson Cory S Baker Paul J Kulkosky |
| Institution: | 1. Department of Psychology, The American University, 20016, Washington, D.C. 2. Laboratory of Metabolism, National Institute on Alcohol Abuse and Alcoholism, 20852, Rockville, Maryland 3. Cornell Medical Center, Westchester Division, Edward W. Bourne Behavioral Research Lab, New York Hospital, 21 Bloomingdale Road, 10605, White Plains, New York |
| Abstract: | In Experiment 1, rats poisoned following schedule-induced saccharin consumption showed a moderate reduction in the schedule-induced consumption of saccharin. With repeated poisoning, schedule-induced saccharin polydipsia was markedly reduced. Acquisition of conditioned aversion under the schedule-induced procedure was significantly slower than acquisition under water deprivation. In addition, recovery of consumption of the previously poisoned solution during extinction was more rapid under schedule-induced polydipsia. Experiment 2 revealed that schedule-induced polydipsia was less sensitive to suppression by conditioned aversions than a prandial drinking condition in which subjects were equally food deprived but were given a mass feeding instead of spaced pellet deliveries, suggesting that the relative insensitivity of schedule-induced polydipsia to conditioned taste aversions is not simply a function of different levels of food deprivation. This relative insensitivity is offered as a partial basis for the occurrence and maintenance of schedule-induced alcohol polydipsia. |
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