Document Detail

Priming-produced facilitation or diminution of responding to a Pavlovian unconditioned stimulus.
MedLine Citation:
PMID:  7288366     Owner:  NLM     Status:  MEDLINE    
Two experiments, concerned with signal-produced variation of unconditioned response (UR) amplitude, evaluated the roles of US intensity and response measure in determining when signaling the US results in a conditioned diminution or a conditioned facilitation of responding. In Experiment 1, rabbits received discrimination training, in an eye-blink-conditioning preparation, with a 1-mA, 50-msec shock US. In testing, preceding the US by SC+ facilitated the eye blink response compared with preceding the US by CS- or neither CS. In Experiment 2, subjects received discrimination training with a 5-mA US and were tested with 1-, 2-, and 5-mA US. During testing, subjects' eye blink responses (for which robust CRs were observed) and gross body movement responses (for which no CRs were observed) were simultaneously recorded. for the eye blink response, preceding the US by CS+ facilitated responding to the 1-mA US, produced negligible differences in responding to the 2-mA US, and diminished responding to the 5-mA US, compared with preceding the US by CS- or neither CS. For the movement response, preceding the US by CS+ diminished responding at all three US intensities, with the decremental effects increasing with increases in US intensity. The results of Experiments 1 and 2 are discussed in terms of the dual effects of CS+: the diminution of US processing and the contribution of the conditioned response to the measured response.
N H Donegan
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Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, Non-P.H.S.    
Journal Detail:
Title:  Journal of experimental psychology. Animal behavior processes     Volume:  7     ISSN:  0097-7403     ISO Abbreviation:  J Exp Psychol Anim Behav Process     Publication Date:  1981 Oct 
Date Detail:
Created Date:  1981-12-21     Completed Date:  1981-12-21     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  7504289     Medline TA:  J Exp Psychol Anim Behav Process     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  295-312     Citation Subset:  IM    
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MeSH Terms
Association Learning
Conditioning, Classical*
Conditioning, Eyelid*
Discrimination Learning
Reversal Learning

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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