| Effects of target enhancement and distractor suppression on multiple object tracking capacity. | |
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MedLine Citation:
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PMID: 19761324 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Mounting evidence suggests that visual attention may be simultaneously deployed to multiple distinct object locations, but the constraints upon this multi-object attentional system are still debated. Results from multiple object tracking (MOT) experiments have been interpreted as revealing a fixed attentional capacity limit of 4 objects, while other evidence has suggested that attentional capacity may be more fluid. Here, we investigated the influence of target stimulus factors, such as speed and size, and of distractor filtering factors, such as number of distractors and screen density, on MOT performance. Each factor had significant effects on capacity, producing values that ranged from above 6 objects down to one object, depending on the task demands. Although our results support the view that crowding effects modulate the effective capacity of attention, we also find evidence that central processes related to distractor suppression and target enhancement modulate capacity. |
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Authors:
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Katherine C Bettencourt; David C Somers |
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Publication Detail:
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Type: Journal Article; Research Support, U.S. Gov't, Non-P.H.S. Date: 2009-07-14 |
Journal Detail:
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Title: Journal of vision Volume: 9 ISSN: 1534-7362 ISO Abbreviation: J Vis Publication Date: 2009 |
Date Detail:
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Created Date: 2009-09-18 Completed Date: 2009-12-11 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101147197 Medline TA: J Vis Country: United States |
Other Details:
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Languages: eng Pagination: 9 Citation Subset: IM |
Affiliation:
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Department of Psychology, Boston University, Boston, MA, USA. kcrum@bu.edu |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Attention
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physiology* Humans Perceptual Masking* Photic Stimulation / methods Pursuit, Smooth / physiology* Time Factors Young Adult |
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