The role of metrical information in apraxia of speech. Perceptual and acoustic analyses of word stress
The role of metrical information in apraxia of speech. Perceptual and acoustic analyses of word stress
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DOI：
10.1016/j.neuropsychologia.2016.01.009
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发表时间：
2016-02-01
期刊：
影响因子：
2.6
通讯作者：
Ziegler, Wolfram
中科院分区：
文献类型：
--
作者：
Aichert, Ingrid;Spaeth, Mona;Ziegler, Wolfram
已知有几个因素会影响言语失用症（AOS）患者的言语准确性，例如音节结构或单词长度。然而，到目前为止，单词重音的影响在很大程度上被忽视了。更普遍的是，韵律信息在语音产生的语音编码阶段的作用在语音产生模型中经常被忽略。本研究旨在探讨单词重音对AOS中错误产生的影响。我们比较了14例AOS患者（其中3例为纯粹AOS）和6例正常说话者（对照组）的双音节重音在第一个音节（扬格）和第二个音节（抑扬格）。患者在抑扬格词上的错误明显多于扬格词。分段误差的测量效应最为显著。单词持续时间的声学分析显示，与健康对照组相比，患者的扬抑格律具有不成比例的优势。结果表明，德语语用者对格律信息非常敏感。我们认为韵律模式是发音规划的韵律框架，德语中规则的韵律模式，即扬格形式，对AOS患者的单词生成有促进作用。(C) 2016 Elsevier Ltd.版权所有。
Several factors are known to influence speech accuracy in patients with apraxia of speech (AOS), e.g., syllable structure or word length. However, the impact of word stress has largely been neglected so far. More generally, the role of prosodic information at the phonetic encoding stage of speech production often remains unconsidered in models of speech production. This study aimed to investigate the influence of word stress on error production in AOS. Two-syllabic words with stress on the first (trochees) vs. the second syllable (iambs) were compared in 14 patients with AOS, three of them exhibiting pure AOS, and in a control group of six normal speakers. The patients produced significantly more errors on iambic than on trochaic words. A most prominent metrical effect was obtained for segmental errors. Acoustic analyses of word durations revealed a disproportionate advantage of the trochaic meter in the patients relative to the healthy controls. The results indicate that German apraxic speakers are sensitive to metrical information. It is assumed that metrical patterns function as prosodic frames for articulation planning, and that the regular metrical pattern in German, the trochaic form, has a facilitating effect on word production in patients with AOS. (C) 2016 Elsevier Ltd. All rights reserved.