Retention of aversively motivated responses in rats.

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Abstract
Gave 13 groups of naive male hooded rats 2 types of retention tests 0, 1, 6, or 24 hr. following exposure to electric shock (preshock). When amount of time spent in situations either identical to or different from the preshock apparatus was measured, performance was determined by the stimuli paired with preshock at short retention intervals, and by the location in which S was placed at the beginning of testing at long retention intervals. In a 1-way avoidance situation, performance was determined by the stimuli paired with preshock at both short and long retention intervals. Although the effects of preshock as assessed by the 2 tests seemed different at long retention intervals, both sets of results were interpreted in terms of the flattening of generalization gradients over time. (PsycINFO Database Record (c) 2006 APA, all rights reserved)

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