Effects of Sucrose Concentrations upon Schedule-Induced Polydipsia on a Ffi-60-Sec. Dry-Food Reinforcement Schedule

Abstract

Food-deprived female albino rats were tested under a free-food schedule (FFI-60-sec.) in which water was freely available in both the test chamber and the home cage. 5 groups of 4 Ss each received different formulae of Noyes 45-mg. dry-food pellets. 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” formula 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 and all groups receiving sucrose or glucose pellets drank less than the group that received the “no-glucose” pellet.