Hemispheric lateralization of semantic feature distinctiveness.
Hemispheric lateralization of semantic feature distinctiveness.
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DOI：
10.1016/j.neuropsychologia.2015.05.025
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发表时间：
2015-08
期刊：
影响因子：
2.6
通讯作者：
Blumstein SE
中科院分区：
文献类型：
--
作者：
Reilly M;Machado N;Blumstein SE
最近的语义记忆模型提出，概念的语义表示部分地基于特征网络。在此视图中，对象的独特特征(斑马有条纹)的处理方式与多个对象共享的特征(斑马有四条腿)的处理方式不同。本论文的目的是确定在这种加工过程中是否存在半球差异。在特征验证任务中，参与者回答“是”或“不是”以下概念，这些概念呈现在与共享或独特特征配对的单一视野(左或右)中。两个半球对共同特征的反应时间比对不同特征的反应时间要快，尽管右脑的反应总体上要慢得多，尤其是在处理不同特征的过程中。这些发现支持语义加工的模型，在这种模型中，占主导地位的左半球更有效地执行高度区别性的“精细”编码，而右半球则执行较少的区别性“粗略”编码。
Recent models of semantic memory propose that the semantic representation of concepts is based, in part, on a network of features. In this view, a feature that is distinctive for an object (a zebra has stripes) is processed differently from a feature that is shared across many objects (a zebra has four legs). The goal of this paper is to determine whether there are hemispheric differences in such processing. In a feature verification task, participants responded ‘yes’ or ‘no’ following concepts which were presented to a single visual field (left or right) paired with a shared or distinctive feature. Both hemispheres showed faster reaction times to shared features than to distinctive features, although right hemisphere responses were significantly slower overall and particularly in the processing of distinctive features. These findings support models of semantic processing in which the dominant left hemisphere more efficiently performs highly discriminating ‘fine’ encoding, in contrast to the right hemisphere which performs less discriminating ‘coarse’ encoding.