| Abstract: | Trained 4 groups of female Sprague-Dawley albino rats (N = 24) to press each of 2 bars for reward delayed 120 sec. A different set of distinctive cues prevailed between bar press and food depending on which bar was pressed. For experimental Ss shocks were then introduced following each response to the preferred bar. The response-shock interval was 1.5, 12, or 96 sec. Experimental Ss' preference shifted from the shock bar; preference remained the same for no-shock controls. The rate of changes was a negative function of delay of shock, but final percentage of responses to the nonshock bar was the same for all delays. Results support the hypothesis that delay of punishment as such has no effect on choice at asymptote. (PsycINFO Database Record (c) 2010 APA, all rights reserved) |
