Document Detail

Perceived speed of colored stimuli.
MedLine Citation:
PMID:  10624952     Owner:  NLM     Status:  MEDLINE    
The influence of contrast and color on perceived motion was measured using a speed-matching task. Observers adjusted the speed of an L cone contrast pattern to match that of a variety of colored test patterns. The dependence of speed on test contrast was the same for all test colors measured, differing only by a sensitivity factor. This result suggests that the reduced apparent speed of low contrast targets and certain colored targets is caused by a common cortical mechanism. The cone contrast levels that equate perceived speed differ substantially from those that equate visibility. This result suggests that the neural mechanisms governing speed perception and visibility differ. Perceived speed differences caused by variations in color can be explained by color responses that are characteristic of motion-selective cortex.
R F Dougherty; W A Press; B A Wandell
Publication Detail:
Type:  Clinical Trial; Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  Neuron     Volume:  24     ISSN:  0896-6273     ISO Abbreviation:  Neuron     Publication Date:  1999 Dec 
Date Detail:
Created Date:  2000-01-27     Completed Date:  2000-01-27     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  8809320     Medline TA:  Neuron     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  893-9     Citation Subset:  IM; S    
Department of Psychology, Stanford University, California 94305, USA.
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MeSH Terms
Color Perception / physiology*
Motion Perception / physiology*
Neural Pathways / physiology
Pattern Recognition, Visual
Photic Stimulation
Retinal Cone Photoreceptor Cells / physiology
Sensory Thresholds
Visual Cortex / physiology*
Grant Support

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