Document Detail

Using metamers to explore motion perception.
MedLine Citation:
PMID:  2017888     Owner:  NLM     Status:  MEDLINE    
We examined conditions under which two quite different types of random-dot cinematograms were perceptually matched. In one stimulus type, directions of motion were defined by a uniform distribution; in the other, directions were drawn from a discrete set of just a few, widely separated directions. Cinematograms whose range of uniformly distributed directions lay between 180 and 270 deg could be matched by cinematograms containing just 6-10 discrete directions. The number of discrete directions required for a match was a nonmonotonic function of the range of directions present in the other cinematogram. The results are consistent with a line-element model in which the outputs of 12 direction-selective mechanisms, each with a half-amplitude half-bandwidth of 30 deg, are combined nonlinearly to produce the percept of motion.
D Williams; S Tweten; R Sekuler
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Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, Non-P.H.S.    
Journal Detail:
Title:  Vision research     Volume:  31     ISSN:  0042-6989     ISO Abbreviation:  Vision Res.     Publication Date:  1991  
Date Detail:
Created Date:  1991-05-17     Completed Date:  1991-05-17     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0417402     Medline TA:  Vision Res     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  275-86     Citation Subset:  IM; S    
Department of Neurobiology and Physiology, Northwestern University, Evanston, IL 60208.
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MeSH Terms
Models, Biological
Motion Perception / physiology*
Pattern Recognition, Visual / physiology*

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

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