Effect of detainment on extinction of avoidance responses.

Abstract
Following shuttle-box avoidance training, 10 rats were assigned to each of 6 groups, matched on the basis of trials to acquisition criterion. During extinction, Ss were detained in the presence of the CS (conditioned stimulus) for intervals of 0-20 sec. before being allowed to perform the avoidance response. The rate of extinction increased with the duration of detainment. The results are interpreted in terms of both "conservation of anxiety" and counterconditioning.

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