Disinhibition and spontaneous recovery of response decrements produced by free reinforcement in rats.

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Abstract
Conducted 3 experiments with a total of 16 Holtzman albino and 48 hooded male rats. After the Ss had been trained to barpress on a variable interval schedule of reinforcement, response rates were reduced by the introduction either of extinction or of a response-independent (free) reinforcement schedule. Spontaneous recovery was consistently obtained in extinction, especially when session durations were long. Under free reinforcement conditions there was little sign of spontaneous recovery, even when with high reinforcement rates response reduction was almost as rapid as in extinction. In disinhibition tests the introduction of noise produced increased responding under free reinforcement conditions but not in extinction. Results are interpreted as demonstrating a dissociation between spontaneous recovery and disinhibition. (23 ref) (PsycINFO Database Record (c) 2006 APA, all rights reserved)

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