Linked Life Data

11273403

Source:http://linkedlifedata.com/resource/pubmed/id/11273403

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
3
pubmed:dateCreated
2001-3-1
pubmed:abstractText
We report evidence demonstrating that a search asymmetry favoring concave over convex targets can be reversed by altering the figure-ground assignment of edges in shapes. Visual search for a concave target among convex distractors is faster than search for a convex target among concave distractors (a search asymmetry). By using shapes with ambiguous local figure-ground relations, we demonstrated that search can be efficient (with search slopes around 10 ms/item) or inefficient (with search slopes around 30-40 ms/item) with the same stimuli, depending on whether edges are assigned to concave or convex "figures." This assignment process can operate in a top-down manner, according to the task set. The results suggest that attention is allocated to spatial regions following the computation of figure-ground relations in parallel across the elements present. This computation can also be modulated by top-down processes.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:status
MEDLINE
pubmed:month
May
pubmed:issn
0956-7976
pubmed:author
pubmed:issnType
Print
pubmed:volume
11
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
196-201
pubmed:dateRevised
2011-5-20
pubmed:meshHeading
pubmed:year
2000
pubmed:articleTitle
A search asymmetry reversed by figure-ground assignment.
pubmed:affiliation
Cognitive Science Research Centre, School of Psychology, University of Birmingham, B15 2TT, United Kingdom. g.w.humphreys@bham.ac.uk
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't