Extinction of avoidance responding in rats: The noise-intensity parameter in noise-facilitation of flooding.

Abstract
Sixty rats were given unsignalled avoidance training in the Baum jump-up apparatus and then were given a period of flooding followed by extinction testing. During flooding, 4 groups of 15 rats each received different intensities of continuous white noise. The noise systematically changed spontaneous behaviour during flooding and increased the efficacy of flooding in hastening extinction in a roughly monotonic fashion. Alternative theoretical explanations were discussed.