The acquisition and extinction of conditioned eyelid responses as a function of the percentage of fixed-ratio random reinforcement.

Abstract

5 different percentages of fixed-ratio random reinforcement upon acquisition and extinction of eyelid conditioning were studied. The CS was light and the UnCS an air-puff. The per cent frequency of CR's during acquisition was clearly a function of the percentage of reinforced trials. During extinction the per cent frequency of CR's was greatest in the 50% and 75% reinforced groups, as compared with the 0%, 25% and 100% groups. 17 references. (PsycINFO Database Record (c) 2006 APA, all rights reserved)