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Presentation
Two stages in object-based attentional guidance -- evidence from event-related brain potentials --
Tetsuko Kasai (Hokkaido Univ.)
Abstract (in Japanese) (See Japanese page) 
(in English) Attention selects “objects” as the most fundamental unit, which may be achieved through a process where attention automatically spreads within the whole region of an object. The present study examined effects of connectedness (connected/unconnected, thickness of the connecting line) on the attention-spreading over bilateral-stimulus arrays by using event-related brain potentials (ERPs). Directions of attention at the moment were indexed by lateralized potentials that enhanced at the hemisphere contralateral to the attended hemi-field. As a result, electrophysiological effects associated with the attention-spreading were identified in the early phase (150-200 ms post-stimulus) and the later phase (330-390 ms). This indicates that attention is serially guided by hierarchical object representations.
Keyword (in Japanese) (See Japanese page) 
(in English) Selective Attention / Object / Visual Grouping / Event-Related Brain Potential / / / /  
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Conference Information
Committee HIP  
Conference Date 2007-06-28 - 2007-06-29 
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Paper Information
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Conference Code 2007-06-HIP 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Two stages in object-based attentional guidance 
Sub Title (in English) evidence from event-related brain potentials 
Keyword(1) Selective Attention  
Keyword(2) Object  
Keyword(3) Visual Grouping  
Keyword(4) Event-Related Brain Potential  
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1st Author's Name Tetsuko Kasai  
1st Author's Affiliation Hokkaido University (Hokkaido Univ.)
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