| The timing of feature-based attentional effects during object perception. | |
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MedLine Citation:
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PMID: 21889519 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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Allocating attention to basic features such as colour enhances perception of the respective features throughout the visual field. We have previously shown that feature-based attention also plays a role for more complex features required for object perception. To investigate at which level object perception is modulated by feature-based attention we recorded high-density event-related potentials (ERPs). Participants detected contour-defined objects or motion, and were informed to expect each feature dimension. Participants perceived contour-defined objects and motion better when they expected the congruent feature. This is consistent with modulation of the P1 when attending to lower-level features. For contours, modulation occurred at 290ms, first at frontal electrodes and then at posterior sites, associated with sources in ventral visual areas accompanied by greater signal strength. This pattern of results is consistent with what has been observed in response to illusory contours. Our data provide novel insights into the contribution of feature-based attention to object perception that are associated with higher tier brain areas. |
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Authors:
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Boge Stojanoski; Matthias Niemeier |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-8-22 |
Journal Detail:
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Title: Neuropsychologia Volume: - ISSN: 1873-3514 ISO Abbreviation: - Publication Date: 2011 Aug |
Date Detail:
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Created Date: 2011-9-5 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0020713 Medline TA: Neuropsychologia Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Copyright Information:
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Copyright © 2011. Published by Elsevier Ltd. |
Affiliation:
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Department of Psychology, University of Toronto at Scarborough, 1265 Military Trail, Toronto, Ontario, M1C 1A4 Canada. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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