Type of start box and goal box distinctiveness in self-punitive running of rats

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A total of 96 male Sprague-Dawley rats were first trained to escape shock in an alley by running to a safe goal box. In Exp I either a trapdoor-floored start box or a guillotine-door start box was used in different groups. In extinction, nonpunished and punished subgroups were tested in each of the start-box conditions. Punishment produced faster running speeds than nonpunishment (self-punitive effect) only with the trapdoor. The trapdoor start box was used in Exp II, and independent groups of Ss were trained to escape to a goal box that was either very dissimilar or similar to the shock area. Nonpunished and punished subgroups were extinguished in each goal box condition. Self-punitive running was more likely with the dissimilar goal box. (PsycINFO Database Record (c) 2006 APA, all rights reserved)

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