| Abstract: | Pretreated 5 groups of 5 male albino Sprague-Dawley rats each with either 0, 10, 40, 80, or 160 5-sec, 1.5-ma pulsed shocks. Ss were then given escape training in a jump-up box. The number of failures to escape was an increasing function of pretreatment shock frequency. Ss that showed the retardation effect escaped irregularly with short latencies on some trials and failures to escape on others. After escape training, Ss in the 0-shock pretreatment group were given 80 5-sec, 1.5-ma pulsed shocks and then exposed to additional escape training in the jump-up box. These Ss did not show the retardation effect. (PsycINFO Database Record (c) 2010 APA, all rights reserved) |
