How perceptual processes help to generate new meaning: An EEG study of chunk decomposition in Chinese characters

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	How perceptual processes help to generate new meaning: An EEG study of chunk decomposition in Chinese characters
	Wu, Lili1 ; Knoblich, Guenther 2; Wei, Gaoxia1 ; Luo, Jing1 ; J. Luo
摘要	Chunk decomposition has been regarded as an important process in problem solving that helps problem solvers to generate new solution paths through changing inappropriate problem representations. We studied the neural bases of chunk decomposition in Chinese characters using the electroencephalogram (EEG). Participants decomposed Chinese characters either at the level of radicals or at the level of strokes to generate new target characters with a different meaning. We hypothesized that decomposition at the stroke levei would require a more fundamental change in the problem representation that should involve differences in basic visual processing. To test this hypothesis, we compared the alpha rhythm (8-13 Hz) over parietal-occipital regions between the two different conditions. The regrouping of tight chunks (stroke level) exhibited a stronger alpha activation than the regrouping of loose chunks approximately 500 ms prior to response. Thus visual areas were less active during the decomposition of tight chunks. Together with a previous fMRI study the results provide convincing evidence that attenuation of early visual information is required to generate new meaning.; Chunk decomposition has been regarded as an important process in problem solving that helps problem solvers to generate new solution paths through changing inappropriate problem representations. We studied the neural bases of chunk decomposition in Chinese characters using the electroencephalogram (EEG). Participants decomposed Chinese characters either at the level of radicals or at the level of strokes to generate new target characters with a different meaning. We hypothesized that decomposition at the stroke levei would require a more fundamental change in the problem representation that should involve differences in basic visual processing. To test this hypothesis, we compared the alpha rhythm (8-13 Hz) over parietal-occipital regions between the two different conditions. The regrouping of tight chunks (stroke level) exhibited a stronger alpha activation than the regrouping of loose chunks approximately 500 ms prior to response. Thus visual areas were less active during the decomposition of tight chunks. Together with a previous fMRI study the results provide convincing evidence that attenuation of early visual information is required to generate new meaning. (C) 2009 Elsevier B.V. All rights reserved.
关键词	Insight problem solving Chunk decomposition Alpha rhythm Parietal-occipital area
学科领域	认知神经科学
	2009-10-16
语种	英语
发表期刊	BRAIN RESEARCH
ISSN	0006-8993
卷号	1296 页码:104-112
期刊论文类型	Article
收录类别	SCI
WOS记录号	WOS:000271168600011
引用统计	被引频次：29[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.psych.ac.cn/handle/311026/5455
专题	中国科学院心理研究所回溯数据库(1956-2010)
通讯作者	J. Luo
作者单位	1.Chinese Acad Sci, Inst Psychol, Key Lab Mental Hlth, Beijing 100101, Peoples R China 2.Radboud Univ Nijmegen, Donders Inst Brain Cognit & Behav, Ctr Cognit, Nijmegen, Netherlands
第一作者单位	中国科学院心理健康重点实验室
推荐引用方式 GB/T 7714	Wu, Lili,Knoblich, Guenther,Wei, Gaoxia,et al. How perceptual processes help to generate new meaning: An EEG study of chunk decomposition in Chinese characters[J]. BRAIN RESEARCH,2009,1296:104-112.
APA	Wu, Lili,Knoblich, Guenther,Wei, Gaoxia,Luo, Jing,&J. Luo.(2009).How perceptual processes help to generate new meaning: An EEG study of chunk decomposition in Chinese characters.BRAIN RESEARCH,1296,104-112.
MLA	Wu, Lili,et al."How perceptual processes help to generate new meaning: An EEG study of chunk decomposition in Chinese characters".BRAIN RESEARCH 1296(2009):104-112.

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