Document Detail

Segregation by color/luminance does not necessarily facilitate motion discrimination in the presence of motion distractors.
MedLine Citation:
PMID:  11436736     Owner:  NLM     Status:  MEDLINE    
Under what circumstances is the common motion of a group of elements more easily perceived when the elements differ in color and/or luminance polarity from their surround? Croner and Albright (1997), using a conventional global motion paradigm, first showed that motion coherence thresholds fell when target and distractor elements were made different in color. However, in their paradigm, there was a cue in the static view of the stimulus as to which elements belonged to the target. Arguably, in order to determine whether the visual system automatically groups, or prefilters, the image into different color maps for motion processing, such static form cues should be eliminated. Using various arrangements of the global motion stimulus in which we eliminated all static form cues, we found that global motion thresholds were no better when target and distractors differed in color than when they were identical, except under certain circumstances in which subjects had prior knowledge of the specific target color. We conclude that, in the absence of either static form cues or the possibility of selective attention to the target color, features with similar colors/luminance-polarities are not automatically grouped for global motion analysis.
H C Li; F A Kingdom
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Perception & psychophysics     Volume:  63     ISSN:  0031-5117     ISO Abbreviation:  Percept Psychophys     Publication Date:  2001 May 
Date Detail:
Created Date:  2001-07-04     Completed Date:  2001-07-19     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0200445     Medline TA:  Percept Psychophys     Country:  United States    
Other Details:
Languages:  eng     Pagination:  660-75     Citation Subset:  IM    
Department of Industrial Psychology, Kwangwoon University, Nowon-Gu, Wolgae-Dong, 447-1, Seoul, Korea.
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MeSH Terms
Color Perception*
Models, Psychological
Motion Perception*
Perceptual Masking
Visual Perception

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

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