50 male albino rats, in 5 groups, were run 4 trials a day, 2 in a black and 2 in a white runway. Ss were continuously rewarded on 48 trials in 1 runway (Sit) ar >d rewarded on a percentage of the 48 trials in the other (S 2 ±) at 100, SO, 25, 12.5, or 0%. In a 2nd phase, conditions were changed so that none of the trials to Si were rewarded while all S» trials were. In Phase 1, speeds to Ss± increased as a negatively accelerated function of percentage of reward. Speeds to SiJ increased slightly as well. In Phase 2, resistance to extinction to Si-was related to prior percentage of reward to Sa± but speeds to 82+ were not. The findings were interpreted within the framework of Amsel's theory of frustrative nonreward.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.