Document Detail

The line motion illusion: the detection of counterchanging edge and surface contrast.
MedLine Citation:
PMID:  20695699     Owner:  NLM     Status:  MEDLINE    
A version of the line motion illusion (LMI) occurs when one of two adjacent surfaces changes in luminance; a new surface is perceived sliding in front of the initially presented surface. Previous research has implicated high-level mechanisms that can create or modulate LMI motion via feedback to lower-level motion detectors. It is shown here that there also is a non-motion-energy, feedforward basis for LMI motion entailing the detection of counterchange, a spatial pattern of motion-specifying stimulus information that combines changes in edge contrast with oppositely signed changes in background-relative surface contrast. It was concluded that (1) in addition to LMI motion, edge/surface counterchange could be the basis for perceiving continuous object motion, (2) counterchange detection is the likely basis for third-order motion perception (Lu & Sperling, 1995a), and (3) motion energy and counterchange mechanisms could be composed of different arrangements of the same spatial and temporal filters, the former detecting motion at a single location, the latter detecting the motion path between pairs of locations.
Howard S Hock; David F Nichols
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of experimental psychology. Human perception and performance     Volume:  36     ISSN:  1939-1277     ISO Abbreviation:  J Exp Psychol Hum Percept Perform     Publication Date:  2010 Aug 
Date Detail:
Created Date:  2010-08-10     Completed Date:  2010-12-20     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7502589     Medline TA:  J Exp Psychol Hum Percept Perform     Country:  United States    
Other Details:
Languages:  eng     Pagination:  781-96     Citation Subset:  IM    
Department of Psychology, Florida Atlantic University, Boca Raton, FL 33431, USA.
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MeSH Terms
Contrast Sensitivity*
Discrimination Learning
Generalization, Stimulus
Motion Perception*
Optical Illusions*
Pattern Recognition, Visual*
Perceptual Distortion

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