Document Detail


Perceptual interaction between real and synesthetic colors.
MedLine Citation:
PMID:  16683493     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
People with color-graphemic synesthesia experience vivid, reliable color upon viewing achromatic alphanumeric characters. Recent evidence indicates that synesthetic color experiences are as perceptually real as actual colors are for non-synesthetic observers. To investigate possible interactions between real and synesthetic colors, we tested two adult color-graphemic synesthetes on a pair of perceptual grouping tasks. In Experiment 1, we employed a well-known phenomenon of motion perception, bistable apparent motion, to explore whether synesthetic colors interact with real colors in grouping over time. Two-frame apparent motion sequences were presented with both path lengths and colors systematically manipulated. Results showed that synesthetic colors of motion tokens interacted with matching real colors of the corresponding motion tokens, which could subsequently bias perceived direction of motion. In Experiment 2, we exploited binocular rivalry, a condition under which two dissimilar monocular images compete with each other and result in perceptual switches, to explore whether synesthetic colors interact with real colors in grouping over space. Pairs of rival images with two different characters were presented dichoptically with colors of characters manipulated. Results showed that synesthetic and real colors of characters tended to group together, which, in turn, promoted the perceived global dominance during binocular rivalry. Therefore, the present results identify substantial interaction between synesthetic colors and real colors in perceptual grouping.
Authors:
Chai-Youn Kim; Randolph Blake; Thomas J Palmeri
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Publication Detail:
Type:  Journal Article; Research Support, N.I.H., Extramural; Research Support, U.S. Gov't, Non-P.H.S.    
Journal Detail:
Title:  Cortex; a journal devoted to the study of the nervous system and behavior     Volume:  42     ISSN:  0010-9452     ISO Abbreviation:  Cortex     Publication Date:  2006 Feb 
Date Detail:
Created Date:  2006-05-10     Completed Date:  2006-09-07     Revised Date:  2009-11-11    
Medline Journal Info:
Nlm Unique ID:  0100725     Medline TA:  Cortex     Country:  Italy    
Other Details:
Languages:  eng     Pagination:  195-203     Citation Subset:  IM    
Affiliation:
Department of Psychology, Vanderbilt University Nashville, Nashville, TN 32703, USA.
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MeSH Terms
Descriptor/Qualifier:
Adult
Association*
Attention
Color Perception*
Discrimination Learning
Dominance, Cerebral
Female
Humans
Imagination*
Male
Motion Perception
Optical Illusions
Orientation
Pattern Recognition, Visual*
Reading*
Reality Testing*
Semantics*
Vision Disparity
Grant Support
ID/Acronym/Agency:
EY01138/EY/NEI NIH HHS; EY07750/EY/NEI NIH HHS; MH61370/MH/NIMH NIH HHS

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


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