Document Detail

Examination of a backchaining/counterconditioning process during the extinction of conditioned fear.
MedLine Citation:
PMID:  1977379     Owner:  NLM     Status:  MEDLINE    
Two experiments using rat subjects are reported which attempt to delineate the theoretical mechanisms involved in exposure/extinction procedures that are used to eliminate conditioned fear. In Experiment 1, a within-subjects design was employed to study the temporal course of the extinction process by examining the relationship among three separate measures of classically conditioned fear--suppression of an ongoing, operant behavior during the nonreinforced fear-eliciting CS presentation, the time to the first response during this CS presentation, and the time to recover responding following termination of the CS. The results indicated a temporal relationship among these measures, both within and across nonreinforced CS trials, which were considered to reflect a backchaining of a fear-antagonistic response during extinction, and provided an empirical demonstration of an extinction process consistent with Denny's (Behaviour Therapy and Experimental Psychiatry, 7, 315-321, 1976) elicitation/backchaining explanation of extinction. Experiment 2 attempted to manipulate the course of extinction and the temporal relationship among these three fear measures through the paired presentations of the fear CS with a palatable substance (maltose). This procedure produced greater extinction apparently by facilitating the backchaining process. These results are discussed with implications for exposure-based therapies.
E J Callen; T L Boyd
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Behaviour research and therapy     Volume:  28     ISSN:  0005-7967     ISO Abbreviation:  Behav Res Ther     Publication Date:  1990  
Date Detail:
Created Date:  1990-11-08     Completed Date:  1990-11-08     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0372477     Medline TA:  Behav Res Ther     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  261-71     Citation Subset:  IM    
University of South Carolina, Aiken 29801.
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MeSH Terms
Conditioning, Classical*
Desensitization, Psychologic*
Extinction, Psychological*
Implosive Therapy*
Reaction Time

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

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