Document Detail

When discrimination fails (or at least falters).
MedLine Citation:
PMID:  17044739     Owner:  NLM     Status:  MEDLINE    
Pigeons learned 2 concurrent simultaneous discriminations in which the pecking of left keys versus right keys was reinforced depending on a color that appeared on one of the keys. When the reinforced choice was to peck directly at the color, accuracy was very high initially, but dropped noticeably with continued training. Partial reinforcement of these choices exacerbated the dropoff, sometimes causing accuracies to fall close to zero. By contrast, when the reinforced choice was to peck the alternate-key stimulus, accuracy was very low, initially, but remained high and stable following acquisition. Lowering the reinforcement probability, even to zero, for the latter choices had little effect on their accuracy but yielded increased accuracy on color-choice trials. These results resemble the ambiguous-cue effect and suggest the process of value transfer.
Peter J Urcuioli
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Publication Detail:
Type:  Journal Article; Research Support, N.I.H., Extramural    
Journal Detail:
Title:  Journal of experimental psychology. Animal behavior processes     Volume:  32     ISSN:  0097-7403     ISO Abbreviation:  J Exp Psychol Anim Behav Process     Publication Date:  2006 Oct 
Date Detail:
Created Date:  2006-10-18     Completed Date:  2007-01-23     Revised Date:  2007-12-03    
Medline Journal Info:
Nlm Unique ID:  7504289     Medline TA:  J Exp Psychol Anim Behav Process     Country:  United States    
Other Details:
Languages:  eng     Pagination:  359-70     Citation Subset:  IM    
Copyright Information:
Copyright 2006 APA.
Department of Psychological Sciences, Purdue University, West Lafayette, IN 47907-2081, USA.
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MeSH Terms
Behavior, Animal
Choice Behavior
Discrimination (Psychology) / physiology*
Perceptual Disorders / diagnosis*
Reaction Time
Reinforcement (Psychology)
Transfer (Psychology)
Grant Support

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

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