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Attention-spreading Based on Hierarchical Spatial Representations for Connected Objects
| Title: | Attention-spreading Based on Hierarchical Spatial Representations for Connected Objects |
| Authors: | Kasai, Tetsuko Browse this author |
| Issue Date: | Jan-2010 |
| Publisher: | MIT Press |
| Journal Title: | Journal of Cognitive Neuroscience |
| Volume: | 22 |
| Issue: | 1 |
| Start Page: | 12 |
| End Page: | 22 |
| Publisher DOI: | 10.1162/jocn.2008.21158 |
| PMID: | 19016610 |
| Abstract: | Attention selects objects or groups as the most fundamental unit, and this may be achieved through a process in which attention automatically spreads throughout their entire region. Previously, we found that a lateralized potential relative to an attended hemifield at occipito-temporal electrode sites reflects attention-spreading in response to connected bilateral stimuli [Kasai, T., & Kondo, M. Electrophysiological correlates of attention-spreading in visual grouping. NeuroReport, 18, 93-98, 2007]. The present study examined the nature of object representations by manipulating the extent of grouping through connectedness, while controlling the symmetrical structure of bilateral stimuli. The electrophysiological results of two experiments consistently indicated that attention was guided twice in association with perceptual grouping in the early phase (N1, 150-200 msec poststimulus) and with the unity of an object in the later phase (N2pc, 310/330-390 msec). This suggests that there are two processes in object-based spatial selection, and these are discussed with regard to their cognitive mechanisms and object representations. |
| Rights: | © 2008 Massachusetts Institute of Technology |
| Relation: | http://www.mitpressjournals.org/loi/jocn |
| Type: | article |
| URI: | http://hdl.handle.net/2115/42985 |
| Appears in Collections: | 教育学院・教育学研究院 (Graduate School of Education / Faculty of Education) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 河西 哲子
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