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501.
Conditioning-specific reflex modification occurs when an unconditioned response is modified in theabsence of the conditioned stimulus as a result of pairings of the conditioned stimulus and an unconditioned stimulus. In two experiments,
we assessed conditioning-specific reflex modification in either a novel context (Experiment 1) or a context different from,
but equally familiar in relation to, the training context (Experiment 2). Conditioning-specific reflex modification did not
demonstrate sensitivity to a novel context but did demonstrate sensitivity to a change in familiar context. The data cannot
be explained by unconditioned stimulus preexposure, overtraining, or context insensitivity. The results suggest that conditioning-specific
reflex modification models normal stress and may be used to evaluate theories of and treatments for posttraumatic stress disorder. 相似文献
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Abstract College students (N = 72) took a four-minute test of addition on two separate days, once preceded by an exhausting treadmill run and once without prior exertion. Scores were recorded for speed and accuracy for each minute and for the total four minutes. It was found that the exertion had a significant negative effect on accuracy for the total four minutes as well as for the second and fourth minute. No significant effect of exertion on speed was obtained. When control and experimental conditions were considered together a significant trend in favor of high fitness subjects was found on speed of addition. Significant differences in favor of medium and high fitness subjects were found on accuracy of addition. 相似文献