Abstract
The persistence of conditioned fear was measured for varying intervals of time after conditioning in an acquired drive experiment. UCS intensity and number of CS-UCS pairings were varied at two levels during conditioning and the effects on a hurdle-jump test response were measured 24 h, 48 h, and 7 days after conditioning. It was found that the effects of a high UCS intensity persisted for 7 days after conditioning, but that the effects a medium UCS intensity dissipated after 48 h after conditioning. The results were interpreted in terms of the relative contribution of UCS intensity to sHr and to D in the Spence-Hull system.
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Preparation of this report was supported in part by a supply grant and Summer Faculty Fellowships awarded by the Indiana University Office of Research and Advanced Studies (Grant 26-631-32). Charles Borneman, Jr., made the drawings, and Andy Elledge typed the manuscript. The writer wishes to thank his wife Daidee for her patience during the course of this work.
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Goldstein, M.L. The persistence of UCS intensity effects in acquired drive conditioning. Bull. Psychon. Soc. 4, 166–168 (1974). https://doi.org/10.3758/BF03334231
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DOI: https://doi.org/10.3758/BF03334231