Document Detail

Cone excitation ratios correlate with color discrimination performance in the horse (Equus caballus).
MedLine Citation:
PMID:  17115866     Owner:  NLM     Status:  MEDLINE    
Six horses (Equus caballus) were trained to discriminate color from grays in a counterbalanced sequence in which lightness cues were irrelevant. Subsequently, the pretrained colors were presented in a different sequence. Two sets of novel colors paired with novel grays were also tested. Performance was just as good in these transfer tests. Once the horse had learned to select the chromatic from the achromatic stimulus, regardless of the specific color, they were immediately able to apply this rule to novel stimuli. In terms of the underlying visual mechanisms, the present study showed for the first time that the spectral sensitivity of horse cone photopigments, measured as cone excitation ratios, was correlated with color discrimination performance, measured as accuracy, repeated errors, and latency of approach.
Carol A Hall; Helen J Cassaday; Chris J Vincent; Andrew M Derrington
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of comparative psychology (Washington, D.C. : 1983)     Volume:  120     ISSN:  0735-7036     ISO Abbreviation:  J Comp Psychol     Publication Date:  2006 Nov 
Date Detail:
Created Date:  2006-11-22     Completed Date:  2007-02-06     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  8309850     Medline TA:  J Comp Psychol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  438-48     Citation Subset:  IM    
School of Animal, Rural and Environmental Sciences, Nottingham Trent University, Southwell, United Kingdom.
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MeSH Terms
Behavior, Animal
Color Perception*
Discrimination (Psychology)*
Discrimination Learning
Photoreceptor Cells, Vertebrate / physiology*

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

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