Relations between segmental and motor variability in prosodically complex nonword sequences
Relations between segmental and motor variability in prosodically complex nonword sequences
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DOI：
10.1044/1092-4388(2007/031
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发表时间：
2007-04-01
影响因子：
2.6
通讯作者：
Lucchesi, Julie
中科院分区：
文献类型：
--
作者：
Goffman, Lisa;Gerken, LouAnn;Lucchesi, Julie
目的：评估韵律突出和层次足结构如何影响语音生产的节段和发音方面，特别是节段的准确性和可变性，和口腔运动轨迹variability.Method：30人参加：10名年轻人，10名儿童谁是正常发展，和10名儿童诊断为特定的语言障碍。在低韵律突出和高韵律突出条件下（即，结果：两组被试之间的研究结果表明，两组儿童都比成人表现出更多的音段错误和音段变异，以及更多的运动轨迹变异。在所有3组中观察到了类似的参与者内结果模式。韵律的突出影响段和运动水平的分析，与弱音节产生不太准确，更多的嘴唇和下巴运动轨迹的变化比强音节。然而，分级脚结构影响段，但不电机措施的语音生产的准确性和variability.Conclusions：电机和段变量并不一致。这种结果模式具有临床意义，因为有关运动变异性的推断可能不直接遵循节段变异性的观察结果。
Purpose: To assess how prosodic prominence and hierarchical foot structure influence segmental and articulatory aspects of speech production, specifically segmental accuracy and variability, and oral movement trajectory variability.Method: Thirty individuals participated: 10 young adults, 10 children who are normally developing, and 10 children diagnosed with specific language impairment. Segmental error and segmental variability and movement trajectory variability were compared in low and high prosodic prominence conditions (i.e., strong and weak syllables) and in different prosodic foot structures.Results: Between-participants findings were that both groups of children showed more segmental error and segmental variability and more movement trajectory variability than did adults. A similar within-participant pattern of results was observed for all 3 groups. Prosodic prominence influenced both segmental and motor levels of analysis, with weak syllables produced less accurately and with more lip and jaw movement trajectory variability than strong syllables. However, hierarchical foot structure affected segmental but not motor measures of speech production accuracy and variability.Conclusions: Motor and segmental variables were not consistently aligned. This pattern of results has clinical implication because inferences about motor variability may not directly follow from observations of segmental variability.