How perceptual processes help to generate new meaning: An EEG study of chunk decomposition in Chinese characters
How perceptual processes help to generate new meaning: An EEG study of chunk decomposition in Chinese characters
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感知过程如何帮助产生新的意义：汉字组块分解的脑电图研究
DOI：
10.1016/j.brainres.2009.08.023
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发表时间：
2009-10-16
期刊：
影响因子：
2.9
通讯作者：
Luo, Jing
中科院分区：
文献类型：
--
作者：
Wu, Lili;Knoblich, Guenther;Luo, Jing
块分解是问题求解中的一个重要过程，它可以帮助问题求解者通过改变不恰当的问题表示来生成新的求解路径。本文利用脑电研究了汉字组块分解的神经基础。受试者在偏旁或笔画两个层次上分解汉字，以生成具有不同含义的新目标字。我们假设，分解在中风levei将需要一个更根本的变化，在问题的表征，应涉及在基本的视觉处理的差异。为了验证这一假设，我们比较了两种不同条件下顶枕区的α节律（8-13 Hz）。紧密组块（中风水平）的重组表现出更强的α激活比松散组块的重组约500毫秒前的响应。因此，在分解紧密的块时，视觉区域不太活跃。与之前的功能磁共振成像研究一起，该结果提供了令人信服的证据，表明早期视觉信息的衰减需要产生新的意义。(C)2009爱思唯尔有限公司版权所有。
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.