Development and phonetic differentiation of speech movement patterns
Development and phonetic differentiation of speech movement patterns
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DOI：
10.1037/0096-1523.25.3.649
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发表时间：
1999-06-01
影响因子：
2.1
通讯作者：
Smith, A
中科院分区：
文献类型：
--
作者：
Goffman, L;Smith, A
人们经常假设，幼儿的语言产生单位不那么独特，而广义的运动原语或模板作为基础，在此基础上，独特的、成熟的模板将在以后得到阐述。这一假设是通过分析4岁、7岁和成年说话者在只有一个音素变化的话语过程中下唇单个闭开语言运动的形状和稳定性来检验的。为了评估广义模板的存在，对下唇运动序列进行了时间和幅度归一化，并实施了模式识别程序。研究结果表明，儿童的语言运动在4岁时就已经形成了独特的语音模式。时空稳定性指数表明，运动序列的基本模式稳定性随着成熟度的提高而提高。
It is often hypothesized that speech production units are less distinctive in young children and that generalized movement primitives, or templates, serve as a base on which distinctive, mature templates are later elaborated. This hypothesis was examined by analyzing the shape and stability of single close-open speech movements of the lower lip recorded in 4-year-old, 7-year-old, and adult speakers during production of utterances that varied in only a single phoneme. To assess the presence of a generalized template, lower lip movement sequences were time and amplitude normalized, and a pattern recognition procedure was implemented. The findings indicate that speech movements of children already converged on phonetically distinctive patterns by 4 years of age. In contrast, an index of spatiotemporal stability demonstrated that the stability of underlying patterning of the movement sequence improves with maturation.