Contingency between a response and an aversive event in the rat.

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Abstract
During the signal of a discriminative punishment procedure there is an increase in the frequency of occurrence of aversive events and an increase in the contingency between a response and the aversive event. These factors contribute to the magnitude of suppression produced by discriminative punishment (Exp. I). The response suppression during a signal indicating an increase in the contingency between a response and an aversive event can result from a reaction to the last punishment rather than from an anticipation of the next punishment (Exp. II and III). Ss were 60 naive male albino Norway rats. (PsycINFO Database Record (c) 2006 APA, all rights reserved)