Short-Term Retention in Rats: The Effect of Goal-Arm Confinement
on Delayed Alternation Performance
Douglas S. Grant and M. Layne Marshal
University of Alberta

Gordon and his associates (e.g., Gordon & Feldman, 1978, Learning and Motivation, 9, 164-178; Feldman & Gordon, 1979, Learning and Motivation, 10, 198-210; Gordon, Taylor, & Mowrer, 1981, American Journal of Psychology, 94, 309-322) have reported that a reactivation treatment significantly enhances memory for prior forcings in delayed alternation using rats. The reactivation treatment consisted of placing the rat in the goal arm to which it had been forced previously on that trial. The confinement occurred in the absence of food and was 5 sec in duration. The present experiments explored the possibility that the treatment might influence performance by affording an opportunity for new information to be acquired during the confinement period. Evidence consistent with this view was found in that (1) accuracy was reduced on trials in which the initial event was a 5-sec confinement to the arm opposite that of the target forcing and (2) increasing the duration of the confinement from 5 to 15 to 45 sec increased the magnitude of this effect. It was concluded that the effectiveness of goal-arm confinement as a reactivation treatment does not necessarily implicate processes of retrieval in delayed alternation behavior.