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Integration of colour, motion, orientation, and spatial frequency in visual search
Uppsala University, Disciplinary Domain of Humanities and Social Sciences, Faculty of Social Sciences, Department of Psychology.
2009 (English)In: Perception, ISSN 0301-0066, E-ISSN 1468-4233, Vol. 38, no 5, 708-718 p.Article in journal (Refereed) Published
Abstract [en]

Response times (RTs) in visual search were measured with either a single target specified by colour, motion, spatial frequency, or orientation alone, or specified by pairwise conjunctions of these features, or by presenting double targets, each specified by a separate feature. First, for all feature combinations, except for motion–colour, RTs were faster when double features were used to specify a single target than when they specified separate targets, implying location-specific redundancy gains predicted by coactivation on a common location-specific map. Second, coactivation, as revealed by race-model violations, occurred for all double-feature single-target conditions except the motion–colour and colour–orientation combinations. No violations occurred in double-target conditions. Taken together, these results are accounted for by well-known feature-specific sensitivities of cortical V1 cells and provide further evidence for a V1 locus of redundancy gain in visual search.

Place, publisher, year, edition, pages
2009. Vol. 38, no 5, 708-718 p.
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URN: urn:nbn:se:uu:diva-120907DOI: 10.1068/p6072ISI: 000268263200008PubMedID: 19662946OAI: oai:DiVA.org:uu-120907DiVA: diva2:304170
Available from: 2010-03-17 Created: 2010-03-17 Last updated: 2010-12-28Bibliographically approved

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