EFFECTS OF US INTENSITY DURING PREVIOUS DISCRETE DELAY CONDITIONING ON CONDITIONED ACCELERATION DURING AVOIDANCE EXTINCTION

Determined the extent to which the increase in avoidance rates during the presentation of an aversive Pavlovian CS (conditioned acceleration) would be proportionate to the intensity of the UCS employed during classical conditioning. 4 naive male Wistar rats were run in a free-operant shuttle-box avoidance situation with light-shock pairings conducted separately. Each S was run at all 4 intensities. For all Ss, conditioned acceleration proved to be monotonically related to UCS intensity. The mean days to extinction was also monotonically related to UCS intensity but nonsignificantly. (PsycINFO Database Record (c) 2006 APA, all rights reserved). © 1969 American Psychological Association.