Document Detail

Feature-based attention promotes biological motion recognition.
MedLine Citation:
PMID:  21926183     Owner:  NLM     Status:  MEDLINE    
Motion perception is important for visually segregating and identifying objects from their surroundings, but in some cases extracting motion cues can be taxing to the human attention system. We measured the strength of feature salience required for individuals to correctly judge three types of moving events: biological motion, coherent motion, and multiple object tracking. The motion animations were embedded within a larger Gabor grid and constructed such that motion was conveyed by a salient single-feature dimension (second order) or by alternating across equisalient feature dimensions (third order). In the single-feature displays, we found biological motion to require less difference in the Gabor features (relative to background) to yield equivalent task performance as the coherent motion or multiple object tracking. This main effect of feature magnitude may reflect the inherent salience of biological motion as a visual stimulus. In the alternating-feature displays, both the biological motion and coherent motion discriminations needed additional salience, as compared to the single-feature displays, to achieve threshold discrimination levels. Accuracy in the multiple object tracking task did not vary as a function of salience. Together, these findings demonstrate the effectiveness with which attention-based motion mechanisms operate in complex dynamic sequences and argue for a critical role of feature-based attention in promoting biological motion perception.
Sarah C Tyler; Emily D Grossman
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't     Date:  2011-09-01
Journal Detail:
Title:  Journal of vision     Volume:  11     ISSN:  1534-7362     ISO Abbreviation:  J Vis     Publication Date:  2011  
Date Detail:
Created Date:  2011-09-19     Completed Date:  2012-01-26     Revised Date:  2013-01-09    
Medline Journal Info:
Nlm Unique ID:  101147197     Medline TA:  J Vis     Country:  United States    
Other Details:
Languages:  eng     Pagination:  11     Citation Subset:  IM    
Department of Cognitive Sciences, Center for Cognitive Neuroscience, University of California, Irvine, Irvine, CA, USA.
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MeSH Terms
Attention / physiology*
Motion Perception / physiology*
Pattern Recognition, Visual / physiology*
Photic Stimulation / methods
Young Adult

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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