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| Research article summary (published 30 Mar 2003): |
Changing your mind: on the contributions of top-down and bottom-up guidance in visual search for feature singletons.
Full Abstract
Observers, searching for targets among distractor items, guide attention with a mix of top-down information--based on observers' knowledge--and bottom-up information--stimulus-based and largely independent of that knowledge. There are 2 types of top-down guidance:
explicit information (e.g., verbal description) and implicit priming by preceding targets (top-down because it implies knowledge of previous searches). Experiments 1 and 2 separate bottom-up and top-down contributions to singleton search. Experiment 3 shows that priming effects are based more strongly on target than on distractor identity. Experiments 4 and 5 show that more difficult search for one type of target (color) can impair search for other types (size, orientation). Experiment 6 shows that priming guides attention and does not just modulate response.
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Author information
Author/s: Wolfe, Jeremy M (JM); Butcher, Serena J (SJ); Lee, Carol (C); Hyle, Megan (M);
Affiliation: Department of Surgery, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts 02115, USA. wolfe(-atsign-)search.bwh.harvard.edu
Grants: EY05087 (Agency:United States NEI)
Journal and publication information
Publication Type: Clinical Trial; Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, P.H.S.
Journal: Journal of experimental psychology. Human perception and performance (J Exp Psychol Hum Percept Perform), published in United States. (Language: eng)
Reference: 2003-Apr; vol 29 (issue 2) : pp 483-502
Dates: Created 2003/05/22; Completed 2003/09/09; Revised 2007/11/14;
PMID: 12760630, status: MEDLINE (last retrieval date: 11/6/2008)
Sourced from the National Library of Medicine. Abstract text and other information may be subject to copyright.
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