Describes 2 experiments in which female albino Sprague-Dawley rats (n = 24 each) drank a flavored solution for 1/2 hr. After a variable delay interval, Ss were allowed to choose for 15 min between the same solution and a differently flavored one. Ss drank more of the different solution after delays up to 4-6 hr. This result demonstrates spontaneous alternation for tastes, and confirms the long memory span previously observed in gustatory-visceral conditioning. (15 ref) (PsycINFO Database Record (c) 2006 APA, all rights reserved)