Affiliation:
1. University of South Florida and Western Michigan University
Abstract
Six albino rats responded by lever-pressing to avoid grid shock in a free-operant, signaled avoidance situation. Tone cessation was the warning signal for 3 Ss while tone onset was the warning signal for a fourth S. The distribution of avoidance responses during successive reductions of the response-to-warning signal interval indicated a temporal discrimination during the warning signal. Immediate stimulus control, i.e., occurrence of the greatest amount of avoidance responses immediately following the occurrence of the warning signal, was not observed.