" . . . continuous extinction has only the effect of reducing the response strength at all points on the generalization gradient in multiplicative fashion, while successive discrimnation training led to a suppression of responses, specifically in the area of the negative stimulus, and a shift both in the mean and the mode of the gradient away from that value." The discussion is in terms of excitation and inhibition in generalzation training. (PsycINFO Database Record (c) 2006 APA, all rights reserved)