| Motion and color generate coactivation at postgrouping identification stages. | |
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MedLine Citation:
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PMID: 21533630 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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Response times (RTs) were measured in a postgrouping visual identification task. Shapes composed of multiple elements were distinguished by color, motion, orientation, and spatial frequency alone or in pairwise conjunctions. The largest amount of redundancy gain, requiring coactivation as revealed by a race model analysis, was obtained with color-motion conjunctions. In contrast, RTs for a pregrouping detection task using the same target shape as in the identification task, distinguished by color, motion, or a conjunction of these features, showed no evidence for coactivation. The results provide psychophysical evidence for coactivation of color and motion signals in cortical regions specialized for grouping and object identification, as opposed to separate processing of these features in cortical area V1, believed to limit performance in visual search and pregrouping detection. |
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Authors:
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Leo Poom |
Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-4-30 |
Journal Detail:
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Title: Attention, perception & psychophysics Volume: - ISSN: 1943-393X ISO Abbreviation: - Publication Date: 2011 Apr |
Date Detail:
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Created Date: 2011-5-2 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101495384 Medline TA: Atten Percept Psychophys Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
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Department of Psychology, Uppsala University, Box 1225, SE-751 41, Uppsala, Sweden, Leo.Poom@psyk.uu.se. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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