Abstract
The hypothesis that preshock would impede the rate of recovery in activity following additional noncontingent punishment and facilitate recovery following response-contingent punishment was tested by subjecting four groups of hamsters to either preshock and noncontingent punishment, no preshock and noncontingent punishment, preshock and response-contingent punishment, or no preshock and response-contingent punishment. Preshock impeded the rate of recovery of activity from noncontingent punishment but failed to facilitate recovery from response-contingent punishment. Results obtained with two additional groups did not reveal any significant effects of preshock in the absence of further punishment. The findings were compared with those previously obtained with rats.
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