Within-subject partial reinforcement effects: Reward-nonreward transitions and generalization.

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Abstract
Conducted 2 experiments with 60 male albino Holtzman rats and 40 female albino Sprague-Dawley rats, respectively. In Exp. I, increased resistance to extinction in 1 of 2 alleys resulted when transitions from nonreward to reward were allowed to occur in (a) the continuously reinforced alley or (b) the partially reinforced alley. In addition, transitions from reward to nonreward increased resistance to extinction in the rewarded alley following the nonreward trial. Resistance to extinction also increased in the alley where no nonreward-to-reward transitions occurred, relative to a control group which received continuous reinforcement in both alleys. This finding was shown to be due to generalization in Exp II. Results of both experiments are interpreted in terms of E. J. Capaldi's sequential hypothesis of the partial reinforcement effect. (PsycINFO Database Record (c) 2006 APA, all rights reserved)

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