Syllable frequency and syllable structure in the spontaneous speech production of patients with apraxia of speech
Syllable frequency and syllable structure in the spontaneous speech production of patients with apraxia of speech
复制标题
言语失用症患者自发言语产生的音节频率和音节结构
DOI：
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发表时间：
2008
期刊：
影响因子：
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通讯作者：
W. Ziegler
中科院分区：
文献类型：
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作者：
A. Staiger;W. Ziegler
工作背景：已知亚词汇因素音节频率和音节结构会影响言语失用症患者的错误率（例如，Aichert &齐格勒，2004年; Romani & Galluzzi，2005年）。据我们所知，这些因素几乎都是通过单字产出范式来检验的。然而，单字任务的表现并不一定是自发言语产生的良好预测因素，因为会话言语的产生涉及特定条件和额外要求。这可能会影响音节频率和音节结构在解释无语者言语产生准确性时的权重。目的：我们的目的是确定是否自发性言语产生的患者言语失用症（AOS）的音节频率和音节结构的因素的影响。指导我们研究的两个研究问题是：（1）与正常说话者相比，AOS患者自发言语中音节的分布特性是否不同？(2)音节频率和音节结构是否影响AOS患者自发言语的发音准确性？方法和程序：3例AOS患者和15名神经系统未受损的对照组患者产生了至少1000个音节的自发语音样本。结构和频率计数是在德国CELEX数据库的基础上进行的。结果与结果：自发言语样本的分布特性在无障碍说话者和未受损的控制者中是相似的。在所有三名患者中，低频音节的错误比例显著高于高频音节。在两名患者中，当排除了音节结构的任何混淆时，显着的效果甚至持续存在。音节结构效应仅在低频音节中发现。结论：音节频率和音节结构在AOS患者的自发言语产生中对发音准确性起决定性作用。本研究的第一作者得到了DFG ‐德国研究理事会（ZI 469/10 - 2）的资助。我们还要感谢ReHa‐Hilfe e. V.的支持。我们感谢慕尼黑博根豪森医院神经心理学诊所的同事，以及巴德海尔布伦和巴德艾布林康复医院言语治疗部门的工作人员在临床问题上的合作。我们还要向所有参与者表示感谢。
Background: The sublexical factors syllable frequency and syllable structure are known to influence error rates in patients with apraxia of speech (e.g., Aichert & Ziegler, 2004; Romani & Galluzzi, 2005). To our knowledge, these factors have almost exclusively been examined by single‐word production paradigms. However, performance on single‐word tasks is not necessarily a good predictor of spontaneous speech production, since the generation of conversational speech involves specific conditions and additional demands. This might influence the weights of syllable frequency and syllable structure in explanations of the accuracy of speech production in apraxic speakers. Aims: Our aim was to determine if the spontaneous speech production of patients with apraxia of speech (AOS) is influenced by the factors syllable frequency and syllable structure. The two research questions that guided our investigation were: (1) Are the distribution properties of syllables in spontaneous speech different in patients with AOS compared to unimpaired speakers? (2) Do the factors syllable frequency and syllable structure affect articulatory accuracy in the spontaneous speech of patients with AOS? Methods & Procedures: Three patients with AOS and 15 neurologically unimpaired control persons produced samples of spontaneous speech with a minimum of 1000 syllables each. Structure and frequency counts were made on the basis of the German CELEX database. Outcomes & Results: The distribution properties of the spontaneous speech samples were similar in the apraxic speakers and the unimpaired controls. In all three patients the proportion of errors was significantly higher on low‐ than on high‐frequency syllables. In two patients a significant effect even persisted when any confound with syllable structure was ruled out. Syllable structure effects were only found within the low‐frequency syllables. Conclusions: Syllable frequency and syllable structure play a decisive role with respect to articulatory accuracy in the spontaneous speech production of patients with AOS. The first author of this study was supported by a grant from the DFG ‐ German research council (ZI 469/10‐2). We would also like to thank the ReHa‐Hilfe e.V. for their support. We are grateful to our colleagues from the Neuropsychological Clinic, Munich‐Bogenhausen Hospital, Munich, and to the staff from the speech therapy departments at the Rehabilitation Hospitals Bad Heilbrunn and Bad Aibling for their collaboration on clinical issues. We would also like to express our gratitude to all participants.