Semantic weight and verb retrieval in aphasia
Semantic weight and verb retrieval in aphasia
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DOI：
10.1016/j.bandl.2005.11.002
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发表时间：
2006-06-01
影响因子：
2.5
通讯作者：
Boronat, Consuelo B.
中科院分区：
文献类型：
--
作者：
Barde, Laura H. F.;Schwartz, Myrna F.;Boronat, Consuelo B.
与名词相比，失语性失语症患者在动词生成方面可能存在困难。此外，与具有较大语义权重的动词相比，它们可能更难产生具有较少语义成分(即，在语义上较轻)的动词。Gordon和Dell(2003)提出的连接主义动词生成模型通过纠错来学习在语法和语义之间“分工”。语义越重的动词对语法的依赖程度越低，对语义的依赖程度越高。对于轻量级动词，情况正好相反。我们进行这项研究是为了阐明语义权重在失语动词产生中的作用，并验证Gordon和Dell的预测，即损害动词提取的句法输入的脑损伤对较轻动词的损害比对较重动词的损害更大。与这一预测一致，我们发现，在有语法失语症的组中，较轻动词的数量减少，而在没有语法失语症的匹配组中则不存在。(C)2005 Elsevier Inc.保留所有权利。
Individuals with agrammatic aphasia may have difficulty with verb production in comparison to nouns. Additionally, they may have greater difficulty producing verbs that have fewer semantic components (i.e., are semantically "light") compared to verbs that have greater semantic weight. A connectionist verb-production model proposed by Gordon and Dell (2003) learns through error correction to "divide the labor" between syntax and semantics. Verbs that are semantically heavier come to depend less on syntax and more on semantics. For lighter verbs, the reverse is true. We performed this study to clarify the role of semantic weight in aphasic verb production and to test the prediction from Gordon and Dell that a brain lesion that impairs the syntactic input to verb retrieval will impair lighter verbs more than heavier ones. Consistent with this prediction, we found that the decrement for lighter verbs was present in a group with agrammatic aphasia but not in a matched group without agrammatism. (c) 2005 Elsevier Inc. All rights reserved.