Document Detail

Perceptual grouping and attention: not all groupings are equal.
MedLine Citation:
PMID:  15581119     Owner:  NLM     Status:  MEDLINE    
We examined grouping under inattention using Driver, Davis, Russell, Turatto, & Freeman's (2001) method. On each trial, two successive displays were briefly presented, each comprising a central target square surrounded by elements. The task was to judge whether the two targets were the same or different. The organization of the background elements stayed the same or changed, independently of the targets. In different conditions, background elements grouped into columns/rows by color similarity, a shape (a triangle/arrow, a square/cross, or a vertical/horizontal line) by color similarity, and a shape with no other elements in the background. We measured the influence of the background on the target same-different judgments. The results imply that background elements grouped into columns/rows by color similarity and into a shape when no segregation from other elements was involved and the shape was relatively "good." In contrast, no background grouping was observed when resolving figure-ground relations for segregated units was required, as in grouping into a shape by color similarity. These results suggest that grouping is a multiplicity of processes that vary in their attentional demands. Regardless of attentional demands, the products of grouping are not available to awareness without attention.
Ruth Kimchi; Irene Razpurker-Apfeld
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Psychonomic bulletin & review     Volume:  11     ISSN:  1069-9384     ISO Abbreviation:  Psychon Bull Rev     Publication Date:  2004 Aug 
Date Detail:
Created Date:  2004-12-07     Completed Date:  2005-03-01     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9502924     Medline TA:  Psychon Bull Rev     Country:  United States    
Other Details:
Languages:  eng     Pagination:  687-96     Citation Subset:  IM    
University of Haifa, Haifa, Israel.
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MeSH Terms
Color Perception
Form Perception
Reaction Time
Visual Perception*

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

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