| Event-related potentials to overlapping shapes: effects of saliency and interference. | |
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MedLine Citation:
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PMID: 20675794 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Visual perception is often challenged by various difficulties that act concomitantly and whose respective impacts may therefore be hard to distinguish. We used event-related potentials to dissociate the impact of target saliency, generated by occlusion, from that of interference produced by incongruent nontargets. In one block, the target (a square) partially occluded another square tilted by 45 degrees. This nontarget square interfered only to a small extent with target perception. In another block, the target was the occluded stimulus, and interference from the nontarget was substantial. Blocks including two kinds of overlapping shapes (a cross and a square) were added to control for the interference effect. Block comparisons revealed that occlusion modulated an occipital N250 and reaction times. In contrast, interference modulated a parietal N380 but not reaction times. |
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Authors:
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Mathieu B Brodeur; Franco Lepore; Benoit A Bacon; Louis Renoult; J Bruno Debruille |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Attention, perception & psychophysics Volume: 72 ISSN: 1943-393X ISO Abbreviation: Atten Percept Psychophys Publication Date: 2010 Aug |
Date Detail:
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Created Date: 2010-08-02 Completed Date: 2010-12-28 Revised Date: 2011-02-24 |
Medline Journal Info:
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Nlm Unique ID: 101495384 Medline TA: Atten Percept Psychophys Country: United States |
Other Details:
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Languages: eng Pagination: 1471-9 Citation Subset: IM |
Affiliation:
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McGill University, Montreal, Quebec, Canada. mathieu.brodeur@gmail.com |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Adolescent Adult Attention / physiology* Brain Mapping Cerebral Cortex / physiology* Discrimination (Psychology) / physiology* Electroencephalography Evoked Potentials / physiology* Female Humans Male Occipital Lobe / physiology Orientation / physiology* Parietal Lobe / physiology Pattern Recognition, Visual / physiology* Perceptual Masking / physiology* Reaction Time / physiology Signal Processing, Computer-Assisted Young Adult |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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