Factors affecting the measurement of classically conditioned fear in rats following exposure to escapable versus inescapable signaled shock.

Abstract

Three experiments are reported in which rats first received 50 escapable or inescapable signaled-shock trials. Experiment 1 (n = 22) employed an acquired-drive paradigm and found inescapable shock subjects learned a hurdle-jump response to escape the signal less rapidly than did escapable-shock subjects. Experiment 2 (n = 24) employed a conditioned… (More)

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