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Activity during prior shock determines subsequent shock-elicited fighting in the rat |
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| Authors: | D Chris Anderson Charles R Crowell Martin B Wikoff J Victor Lupo |
| Institution: | 1. Department of Psychology, University of Notre Dame, 46556, Notre Dame, Indiana 2. Kreuger, Green Bay, Wisconsin 3. Department of Psychology, Creighton University, Omaha, Nebraska |
| Abstract: | Two experiments investigated the relationship between activity during shock and the magnitude of subsequent impairment of shock-elicited fighting in the rat. Different levels of intra-shock activity were engendered in two ways. In Experiment 1, differing temporal forms of inescapable shock were employed to produce markedly different levels of activity. In Experiment 2, a passive-escape procedure was used to explicitly reinforce nonmovement during shock relative to a yoked, inescapable shock control. Results indicated that relative to the performance of subjects not previously shocked, fighting impairment was produced only by those prior treatments that promoted reduced intrashock activity. Since one of the prior shock treatments involved inescapable shock but the other did not, these findings may be viewed as strong support for the notion that behavior during shock, rather than uncontrollability, is the critical determinant of the observed impairment effects. There was some suggestion in both studies that shock treatments that resulted in sustained or increased intrashock activity tended to produce augmentation of fighting. Both inhibitory and facilitative effects of prior shock exposure are discussed in terms of an interacting response theory of shock treatment effects. |
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