Document Detail

An object-based cost of visual filtering.
MedLine Citation:
PMID:  10909239     Owner:  NLM     Status:  MEDLINE    
Although evidence for object-based attention has been reported in a variety of paradigms, few studies have examined directly the relationship between efficiency in the processing of targets and the number of intervening distractors. In five experiments, observers judged whether the vertices of two relevant shapes were of the same height. Experiments 1 and 2 manipulated observers' perceptual set so that identical stimulus displays were perceived as containing either intervening or flanking distractors. The observers were faster when the distractors were flanking rather than intervening between the targets. Experiments 3-5 varied the number of intervening distractors directly. The observers' response latencies correlated positively with the distractor set-size. Because the distractors were highly discriminable from the targets and the spatial separation between the targets and their interactions with the adjacent distractors were held constant, it was unlikely that the differential reaction times across the conditions were caused by lateral inhibition or response competitions from the distractors. The results suggest the existence of an object-based filtering cost. The implications of the present data for attentional selection over noncontiguous regions are also discussed.
Z Chen
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Perception & psychophysics     Volume:  62     ISSN:  0031-5117     ISO Abbreviation:  Percept Psychophys     Publication Date:  2000 Apr 
Date Detail:
Created Date:  2000-09-19     Completed Date:  2000-09-19     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  0200445     Medline TA:  Percept Psychophys     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  482-95     Citation Subset:  IM    
Princeton University, New Jersey, USA.
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MeSH Terms
Color Perception*
Discrimination Learning*
Inhibition (Psychology)
Pattern Recognition, Visual*
Reaction Time

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

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