1979 Volume 21 Issue 1 Pages 45-50
The effects of response prevention (RP) upon shuttle avoidance behavior was tested after the intersession delay (ISD) of 0 or 4 or 24 hrs using rats as subjects. Under these ISD conditions the RP groups showed an inverted U-shaped curve of avoidance performance in a subsequent extinction test. The results of behavior observation during RP suggested that this inverted U-shaped curve of responding could be attributed to the relative lack of transition from abortive responding to freezing during RP in the RP-4 hr group, which was observed in the other RP groups. The results were interpreted as indicating that the fear dissipated monotonically with time after the original escape/avoidance training.