Facilitative effects of two modes of punishment on resistance to extinction.

Abstract
Rats were trained to escape from either buzzer or shock by traversing a start box and a 4-ft. runway. During extinction, the start box was made safe for all Ss [subjects] but some groups were punished with either .30 sec. of buzzer or shock given in the 1st alley section. Shock punishment increased trials to criterion whereas the buzzer produced a facilitative effect only when Ss had been trained to escape shock. Punished Ss ran faster than controls, except for those Ss trained and punished with a buzzer. Given identical punishing stimuli, cross-modal punishment led to higher speed than a punishment of the same mode as the escape-evoking stimulus.

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