Comprehension of contrastive stress by Broca's aphasics

被引:14
作者
Avrutin, S
Lubarsky, S
Greene, J
机构
[1] Yale Univ, Dept Linguist, Yale Stn, New Haven, CT 06520 USA
[2] Yale Univ, Dept Linguist Anthropol, New Haven, CT 06520 USA
[3] Boston Univ, Sch Med, Dept Neurol, Aphasia Res Ctr, Boston, MA 02215 USA
关键词
stress; pronouns; syntax; discourse; Broca's aphasia; compound nouns; adjectival phrases; processing;
D O I
10.1006/brln.1999.2154
中图分类号
R36 [病理学]; R76 [耳鼻咽喉科学];
学科分类号
100104 ; 100213 ;
摘要
Comprehension of stress as a determiner of reference for pronouns was compared in eight patients with Broca's aphasia (BA) and five age-matched control subjects. The subjects were asked to Listen to sentences in which the stressed or unstressed condition of the pronoun was a critical criterion for the establishment of reference. For each sentence, subjects were shown three pictures and asked to point to the correct referent of the pronoun. While the controls were nearly perfect in both the stressed and unstressed conditions, BA patients were significantly worse than normals, showing chance performance in both cases. However, a significant disparity was found in the BA patients' selection of the object NP as the referent under stressed and unstressed conditions, indicating that BA subjects are, indeed, sensitive to the stress patterns of pronouns. It was thus hypothesized that the BA patients' chance performance was the result of an inability to implement their knowledge of stress during the processing of sentences involving discourse-related linguistic operations, such as the establishment of pronoun reference (Grodzinsky, Wexler, Chien, Marakovitz, & Solomon, 1993). To test this hypothesis, a second experiment was conducted in which discourse-related operations were eliminated. In this second experiment, comprehension of stress by the same two groups was compared in tasks involving purely morphosyntactic processes. The contrastive stress patterns of other wise homophonous compound nouns and adjectival phrases (e.g., BLACKboard, black BOARD), rather than those of pronouns, were examined. In this grammatically ''simpler'' experiment (i.e., without discourse-related operations), BA subjects scored significantly above chance in their comprehension of sentences involving compound nouns; unexpectedly, however, these same subjects did not show signifi cantly above-chance performance in their comprehension of sentences containing adjectival phrases, Nevertheless, the results obtained in these two experiments seem to support the view that aphasic patients may have a lack of processing capacity, resulting in more errors during the processing of discourse-related linguistic constructions. (C) 1999 Academic Press.
引用
收藏
页码:163 / 186
页数:24
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