Development and phonetic differentiation of speech movement patterns.
Development and phonetic differentiation of speech movement patterns.
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言语运动模式的发展和语音分化。
DOI：
10.1037//0096-1523.25.3.649
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发表时间：
1999
期刊：
影响因子：
--
通讯作者：
Smith,A
中科院分区：
文献类型：
--
作者：
Goffman,L;Smith,A
人们常常假设，幼儿的言语产生单位不太明显，而广义的运动基元或模板可以作为后来详细阐述独特的成熟模板的基础。通过分析 4 岁、7 岁和成人说话者在仅用单个音素变化的话语产生过程中记录下唇的单次闭合-打开言语运动的形状和稳定性来检验这一假设。为了评估通用模板的存在，对下唇运动序列的时间和幅度进行标准化，并实施模式识别程序。研究结果表明，儿童的言语运动在 4 岁时就已经趋于语音独特的模式。相反，时空稳定性指数表明，运动序列的潜在模式的稳定性随着成熟而提高。
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.