Document Detail

Failure to detect changes in color for lines rotating in depth: the effects of grouping and type of color change.
MedLine Citation:
PMID:  10788647     Owner:  NLM     Status:  MEDLINE    
A new technique for measuring change detection was introduced in which contours rotating in depth around a vertical axis (in a computer display) could be altered in color as they passed through their point of minimum extension (the median plane) where a thin static vertical occluder hid the change. Sets of five or six contours were either strongly grouped (similar in length, orientation and spacing) or weakly grouped (of variable length, orientation and spacing). Changes consisted of one line changing to a new color or else two lines swapping colors. The measure was the proportion of missed changes. When subjects were not instructed to look for change almost no changes were reported although subjects were told beforehand that they would have to describe the configuration after viewing it. When subjects were instructed to look for changes, it was found that detection of color change was significantly better for strongly grouped lines. It is proposed that grouping, by reducing redundancy, also reduces attentional demands with respect to the properties on which it is based, making it easier to attend to and therefore detect changes in other properties. We found that it was much easier to detect the introduction of a new color than to detect a swap between two existing colors. It is hypothesized that swap-type changes were harder to detect because they required attention to a conjunction of position and color.
A Rich; B Gillam
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Vision research     Volume:  40     ISSN:  0042-6989     ISO Abbreviation:  Vision Res.     Publication Date:  2000  
Date Detail:
Created Date:  2000-08-04     Completed Date:  2000-08-04     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  0417402     Medline TA:  Vision Res     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  1377-84     Citation Subset:  IM    
School of Psychology, University of New South Wales, Sydney, Australia.
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MeSH Terms
Attention / physiology*
Color Perception / physiology*
Motion Perception / physiology*
Photic Stimulation / methods
Reaction Time

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

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