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Intrasession adaptation and intersession extinction of the components of the orienting response

Intrasession adaptation and intersession extinction of the components of the orienting response Intrasession (adaptation) and intersession (extinction) changes in the skin resistance (SR), heart rate (HR), respiratory rate (RR), and muscle action potentials (MP) components of the orienting response (OR) to auditory stimuli of moderate intensity were compared. Adaptation and extinction curves were very similar in SR and similar in MP. There was essentially no evidence of adaptation or extinction in HR and RR or indeed systematic responsiveness. These findings support the logical inference: adaptation and extinction are equivalent processes mediated by the same neural mechanisms. Significant bilateral differences in prestimulus levels of SR did not affect responses; in each system Ss maintained their rank-order position in the group across session; the responses studied provided little evidence of startle components; and the generally larger reactions in SR and MP on the 1st tone each day were not related to arousal levels as measured by prestimulus levels of functioning. (36 ref.) http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Experimental Psychology: General American Psychological Association

Intrasession adaptation and intersession extinction of the components of the orienting response

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References (26)

Publisher
American Psychological Association
Copyright
Copyright © 1965 American Psychological Association
ISSN
0096-3445
eISSN
1939-2222
DOI
10.1037/h0022684
Publisher site
See Article on Publisher Site

Abstract

Intrasession (adaptation) and intersession (extinction) changes in the skin resistance (SR), heart rate (HR), respiratory rate (RR), and muscle action potentials (MP) components of the orienting response (OR) to auditory stimuli of moderate intensity were compared. Adaptation and extinction curves were very similar in SR and similar in MP. There was essentially no evidence of adaptation or extinction in HR and RR or indeed systematic responsiveness. These findings support the logical inference: adaptation and extinction are equivalent processes mediated by the same neural mechanisms. Significant bilateral differences in prestimulus levels of SR did not affect responses; in each system Ss maintained their rank-order position in the group across session; the responses studied provided little evidence of startle components; and the generally larger reactions in SR and MP on the 1st tone each day were not related to arousal levels as measured by prestimulus levels of functioning. (36 ref.)

Journal

Journal of Experimental Psychology: GeneralAmerican Psychological Association

Published: Dec 1, 1965

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