Document Detail

Evidence against signal enhancement as a mechanism of direct selection by color.
MedLine Citation:
PMID:  17672434     Owner:  NLM     Status:  MEDLINE    
Two of the possible mechanisms that have been put forward to explain precuing effects are signal enhancement and uncertainty reduction. Signal enhancement leads to processing advantages for valid information because the signal at the known input channel is enhanced, whereas uncertainty reduction allows observers to ignore confusing distractor items in a display. Both mechanisms have been reported to be involved in location precuing, but it is still unclear which of these two mechanisms is responsible for color cuing effects. Two experiments are reported in which expectancy for a certain color in a single-item display was created. Targetswere presented briefly and were masked. If color cues produce signal enhancement, then a color cuing effect should result. If color cues only allow uncertainty reduction, however, there should be no color cuing effect because there are no distractors in single-item displays. The results of both experiments favor uncertainty reduction as the mechanism behind color cuing, because no signs of signal enhancement-based cuing effects were observed.
Esther Vierck; Jeff Miller
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Perception & psychophysics     Volume:  69     ISSN:  0031-5117     ISO Abbreviation:  Percept Psychophys     Publication Date:  2007 Apr 
Date Detail:
Created Date:  2007-08-03     Completed Date:  2007-08-27     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  0200445     Medline TA:  Percept Psychophys     Country:  United States    
Other Details:
Languages:  eng     Pagination:  469-76     Citation Subset:  IM    
Department of Psychology, University of Otago, Dunedin, New Zealand.
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MeSH Terms
Choice Behavior*
Color Perception*
Signal Detection, Psychological*
Visual Perception

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

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