Target detection and localization in visual search: a dual systems perspective.

Full Abstract

The dual visual systems framework (Milner & Goodale, 1995) was used to explore target detection and localization in visual search. Observers searched for a small patch of tilted bars against a dense background of upright bars. Target detection was performed along with two different localization tasks:
direct pointing, designed to engage the dorsal stream, and indirect pointing, designed to engage the ventral stream. The results indicated that (1) target detection was influenced more by orientation differences in 3-D space than by 2-D pictorial differences, (2) target localization was more accurate for direct than for indirect pointing, and (3) there were performance costs for indirect localization when it followed target detection, but not for direct localization. This is consistent with direct localization's having greater dependence on the dorsal visual system than either target detection or indirect localization.

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Author information

Author/s: Liu, Geniva (G); Healey, Christopher G (CG); Enns, James T (JT);

Affiliation: Department of Psychology, University of British Columbia, Vancouver, British Columbia, Canada. geniva(-atsign-)interchange.ubc.ca

Journal and publication information

Publication Type: Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S.

Journal: Perception & psychophysics (Percept Psychophys), published in United States. (Language: eng)

Reference: 2003-Jul; vol 65 (issue 5) : pp 678-94

Dates: Created 2003/09/05; Completed 2003/10/10; Revised 2008/11/21;

PMID: 12956577, status: MEDLINE (last retrieval date: 12/26/2008)

Sourced from the National Library of Medicine. Abstract text and other information may be subject to copyright.

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MeSH headings (categories)

This article was linked to the MESH Headings shown below.

Adult
Female
Goals
Humans
Male

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