Moyer, K. E. (1958). Effect of delay between training and extinction on the extinction of an avoidance response. Journal of Comparative and Physiological Psychology, 51(1), 116-118.
http://dx.doi.org/10.1037/h0049011
The effects of various delay periods on extinction of an avoidance response which has not been overlearned extensively is the purpose of this study. 60 naive male rats were taught the avoidance response and then divided into 6 groups receiving delays of 1 hr., 2, 4, 8, 16, or 32 days. The groups did not differ significantly on the number of shocks received during training, number of trials to extinction, or number of days on which spontaneous recovery was shown. However, the 1-hr. group and the 32-day group differ significantly on number of trials to extinction. Also, as the number of days delay increased, the number of animals showing immediate extinction increased. (PsycINFO Database Record (c) 2016 APA, all rights reserved)