Effects of sucrose rewards on the overtraining extinction effect.

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Abstract
Studied the effects of sucrose concentration and number of acquisition trials on performance of 48 naive albino Sprague-Dawley rats in a discrete-trial (retractable bar) situation. 3 levels of bar-press training (120, 360, and 720 trials) were factorially combined with 2 sucrose concentrations (8 and 64%). Results show that extinction performance was an increasing function of sucrose concentration and a nonmonotonic function, increasing to 360 trials and then decreasing, of the number of acquisition trials. No interaction between the variables was observed. Findings are discussed in relation to the Amsel-Spence behavior theory. (21 ref.) (PsycINFO Database Record (c) 2006 APA, all rights reserved)

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