Document Detail

The role of color in the motion system.
MedLine Citation:
PMID:  1413550     Owner:  NLM     Status:  MEDLINE    
We have examined the ability of observers to determine the direction of movement of a variety of colored plaid patterns. When the two plaid components are of unequal spatial frequency or of unequal luminance or chromatic contrast, observers judge the direction of movement incorrectly. These errors are correlated with a misjudgement of the speeds of the two components. Our results provide support for an initial decomposition into oriented components followed by a subsequent component-to-pattern recombination of moving equiluminant and colored plaids. At equal multiples of threshold contrast a moving luminance grating is about 8 times more powerful than a moving equiluminant grating in determining the apparent direction of motion of a plaid. When both are present, luminance and color do not interact linearly. Color and motion must be processed in parallel in at least partially separate pathways.
F L Kool; K K De Valois
Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, Non-P.H.S.; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  Vision research     Volume:  32     ISSN:  0042-6989     ISO Abbreviation:  Vision Res.     Publication Date:  1992 Apr 
Date Detail:
Created Date:  1992-10-29     Completed Date:  1992-10-29     Revised Date:  2007-11-14    
Medline Journal Info:
Nlm Unique ID:  0417402     Medline TA:  Vision Res     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  657-68     Citation Subset:  IM; S    
Department of Physiological Optics, University of California, Berkeley 94720.
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MeSH Terms
Color Perception / physiology*
Contrast Sensitivity
Motion Perception / physiology*
Pattern Recognition, Visual
Sensory Thresholds
Visual Pathways / physiology
Grant Support

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