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The Effect Of Inescapable Shock On Competitive Dominance In Rats, Pamela A. Cheney
The Effect Of Inescapable Shock On Competitive Dominance In Rats, Pamela A. Cheney
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Experimental examination of the generality of learned helplessness has previously been confined to treatment and tests employing aversive motivators, such as electric shock. In the present study, rats were used to evaluate the effect of inescapable shock on their performance in a water test of competitive dominance which employs no aversive motivator. The subjects were paired and pre-tested for competitive dominance. In the experimental groups one member of each pair was treated with inescapable shock and the pairs were then post-tested for competitive dominance either 48, 72, or 168 hours after treatment. The control subjects were pre- and post-tested with …
Positive Conditioned Suppression: An Explanation In Terms Of Multiple And Concurrent Schedules, D. A. Stubbs, J. E. Hughes, S. L. Cohen
Positive Conditioned Suppression: An Explanation In Terms Of Multiple And Concurrent Schedules, D. A. Stubbs, J. E. Hughes, S. L. Cohen
Psychology Faculty Scholarship
Rats performed under a baseline variable-interval schedule of food presentation. A response-independent food schedule was then superimposed on the baseline schedule for different periods of time across different conditions. The response-independent schedule operated for the whole session in some conditions, intermittently for sixty second periods in some, and intermittently for ten-second periods in others. Under these latter two sets of conditions, the response-independent food schedule was stimulus correlated and alternated with the baseline schedule according to a multiple schedule. Response-independent food presentations always suppressed responding. The degree of suppression tended to increase the longer the period of response-independent food. Control …