Inhibition and facilitation in visual word recognition: Prefrontal contribution to the orthographic neighborhood size effect
Inhibition and facilitation in visual word recognition: Prefrontal contribution to the orthographic neighborhood size effect
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DOI：
10.1016/j.neuroimage.2007.04.004
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发表时间：
2007-07-01
期刊：
影响因子：
5.7
通讯作者：
Jacobs, Arthur M.
中科院分区：
文献类型：
--
作者：
Fiebach, Christian J.;Ricker, Brigitte;Jacobs, Arthur M.
单词识别是语言处理的核心组成部分。视觉单词识别的主要作用归因于单词的正字法邻居，即，在拼写上与目标词相似的词。它已被证明，正字法邻居的存在有利于识别的话，但阻碍了拒绝非字。因此，它是假设的正字法邻居的表示至少部分激活在单词识别过程中，它们影响单词识别取决于特定的任务上下文。在本研究中，我们使用功能磁共振成像检查的影响，正字法邻域大小的加快词汇决策的词和非词的神经基础。我们的研究结果表明，词汇性X邻里大小的相互作用，在中背外侧和内侧前额叶皮层，这表明参与的域一般，词汇外的过程中，字和非字处理的正交邻居的影响。这一结果挑战计算模型，提供纯粹的词汇帐户的正字法的邻居效应，并建议在视觉单词识别的执行控制功能的重要作用。(c)2007年爱思唯尔公司All rights reserved.
The recognition of words is a central component of language processing. A major role for visual word recognition has been attributed to the orthographic neighbors of a word, i.e., words that are orthographically similar to a target word. It has been demonstrated that the presence of orthographic neighbors facilitates the recognition of words, but hinders the rejection of nonwords. It is therefore assumed that representations of orthographic neighbors are at least partially activated during word recognition, and that they influence word recognition depending on the specific task context. In the present study, we used fMRI to examine the neural bases of the effect of orthographic neighborhood size on speeded lexical decisions to words and nonwords. Our results demonstrate lexicality X neighborhood size interactions in mid-dorsolateral and medial prefrontal cortex, suggesting the involvement of a domain-general, extra-lexical process for orthographic neighborhood effects on word and nonword processing. This result challenges computational models that offer purely lexical accounts of the orthographic neighborhood effect and suggests an important role for executive control functions during visual word recognition. (c) 2007 Elsevier Inc. All rights reserved.