Compared the disruptive effects ECS administered to 430 naive male mice either 10 sec. or 60 min. after an habituation trial with disruption produced when ECS was administered at the same intervals following responding in a passive-avoidance learning situation. The ECS was effective in attenuating habituation as well as interfering with recall for the learned response. The effect varied significantly as a function of the response-ECS interval in both paradigms. Results suggest similarities between the variables controlling learning and habituation. (PsycINFO Database Record (c) 2006 APA, all rights reserved)