Cone excitation ratios correlate with color discrimination performance in the horse (Equus caballus)

Hall, CA ORCID: 0000-0001-5916-311X, Cassaday, HJ, Vincent, CJ and Derrington, AM, 2006. Cone excitation ratios correlate with color discrimination performance in the horse (Equus caballus). Journal of Comparative Psychology, 120 (4), pp. 438-448. ISSN 0735-7036

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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.

Item Type: Journal article
Publication Title: Journal of Comparative Psychology
Creators: Hall, C.A., Cassaday, H.J., Vincent, C.J. and Derrington, A.M.
Publisher: American Psychological Association
Date: 2006
Volume: 120
Number: 4
ISSN: 0735-7036
Rights: © American Psychological Association
Divisions: Schools > School of Animal, Rural and Environmental Sciences
Depositing User: EPrints Services
Date Added: 09 Oct 2015 09:42
Last Modified: 09 Jun 2017 13:09

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