Document Detail

Contextual modulation of stimulus generalization in rats.
MedLine Citation:
PMID:  19839703     Owner:  NLM     Status:  MEDLINE    
One connectionist analysis of the acquired equivalence/distinctiveness of cues assumes that when similar compounds (e.g., AX and BX) are paired with the same outcome (e.g., food, +; or no food, -), their components come to activate the same configural unit (ABX). When these compounds are paired with different outcomes, their components will come to address different units. Here, rats received appetitive training with eight compounds (e.g., AX+, BX+, CX-, DX-, AY+, BY-, CY-, DY+) that should generate the following configural units: ABX, CDX, ADY, and BCY. In Experiment 1, rats then received aversive conditioning to A, which should activate and revalue representations ABX and ADY. Subsequently, compounds that provided dual activation (i.e., BX and DY) of one of the revalued configural units (ABX and ADY) were shown to elicit greater fear than those compounds that provided a single source of activation to each unit (i.e., DX and BY). Experiment 2 confirmed and extended these findings. These results provide support for the connectionist analysis outlined above and are consistent with the application of this approach to the acquired equivalence/distinctiveness of cues.
James Close; Ulrike Hahn; R C Honey
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of experimental psychology. Animal behavior processes     Volume:  35     ISSN:  1939-2184     ISO Abbreviation:  J Exp Psychol Anim Behav Process     Publication Date:  2009 Oct 
Date Detail:
Created Date:  2009-10-20     Completed Date:  2010-01-05     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7504289     Medline TA:  J Exp Psychol Anim Behav Process     Country:  United States    
Other Details:
Languages:  eng     Pagination:  509-15     Citation Subset:  IM    
Copyright Information:
PsycINFO Database Record (c) 2009 APA, all rights reserved
School of Psychology, Cardiff University, Cardiff, United Kingdom.
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MeSH Terms
Analysis of Variance
Appetitive Behavior / physiology
Association Learning / physiology*
Behavior, Animal / physiology*
Conditioning, Operant / physiology
Discrimination Learning / physiology*
Generalization, Stimulus / physiology*
Pattern Recognition, Visual
Photic Stimulation
Grant Support
//Biotechnology and Biological Sciences Research Council

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

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