Document Detail

Reciprocal overshadowing between intra-maze and extra-maze cues.
MedLine Citation:
PMID:  1496138     Owner:  NLM     Status:  MEDLINE    
In three experiments, rats learned a maze discrimination where the location of food was defined either by reference to extra-maze cues alone, or by both extra- and intra-maze cues. Experiment 1 confirmed earlier results in showing that the presence of intra-maze cues failed to overshadow learning about extra-maze cues, in spite of the former's apparently greater salience. Experiment 2, however, suggested that this result was an artefactual consequence of differences between groups in the proportion of reinforced and unreinforced trials during the course of discriminative training. In Experiment 3, the discrimination was taught by a series of reinforced and unreinforced placement trials, and a significant overshadowing effect was observed. Intra-maze and extra-maze cues seem to compete for association with reinforcement in exactly the same way as any other cues.
J March; V D Chamizo; N J Mackintosh
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  The Quarterly journal of experimental psychology. B, Comparative and physiological psychology     Volume:  45     ISSN:  0272-4995     ISO Abbreviation:  Q J Exp Psychol B     Publication Date:  1992 Jul 
Date Detail:
Created Date:  1992-09-10     Completed Date:  1992-09-10     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  8107270     Medline TA:  Q J Exp Psychol B     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  49-63     Citation Subset:  IM    
Departament de Psicologia Basica, Universitat de Barcelona, Spain.
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MeSH Terms
Appetitive Behavior*
Discrimination Learning*
Social Environment

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