Abstract
Food-deprived female albino rats were tested under free (FFI) and lick-contingent (FR) reinforcement schedules in which water was freely available both in the test chamber and the home cage. Five groups of four Ss each received different formulas of Noyes 45-mg dry food pellets during the experimental sessions. Group 1 received standard formula pellets containing 7.5% glucose. Group 2 received “no-glucose” formula pellets. Groups 3, 4, and 5 received “no-glucose” pellets with 4.0%, 16.0%, and 32.0% sucrose added, respectively, by weight. An inverse relationship between sucrose concentration of the pellets and water intake levels was obtained for the FFI 60-sec schedule, and Ss receiving sucrose pellets drank less water throughout all experimental phases than either the no-sugar group or the 7.5% glucose group of Ss. The differential effects of glucose and sucrose upon water intakes and the differences between FR and FFI drinking performances were discussed.
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Christian, W.P., Riester, R.W. & Schaeffer, R.W. Effects of sucrose concentrations upon schedule-induced polydipsia using free and response-contingent dry-food reinforcement schedules. Bull. Psychon. Soc. 2, 65–68 (1973). https://doi.org/10.3758/BF03327715
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DOI: https://doi.org/10.3758/BF03327715