Lee Jimin, Hustad Katherine C
Department of Communicative Disorders and Waisman Center, University of Wisconsin-Madison, Madison, Wisc., USA.
Folia Phoniatr Logop. 2013;65(1):32-9. doi: 10.1159/000334531. Epub 2013 May 23.
This study examined longitudinal change in speech intelligibility, vowel space, and word duration over 18 months among children with cerebral palsy (CP) who varied in the severity of their speech motor involvement. The study also examined relationships among variables at each time point.
Twenty-two children with CP participated in the study (mean age = 50 months at the first time point). Speech samples were collected at four time points that were 6 months apart. Children were separated into four severity groups based on intelligibility scores.
Change over time varied by severity. Children with CP who did not have speech motor involvement and children in the mild group showed gains in intelligibility, but no changes in vowel space area or word duration. Children in the moderate group showed no significant change, and children in the severe group showed increased vowel space and decreased word durations. Significant positive correlations between intelligibility and vowel space were noted at each time point for data pooled across all children.
Children showed different patterns of change over time in intelligibility, vowel space, and word duration based on their speech motor abilities. The relationship between intelligibility and vowel space across severity groups was constant, suggesting a robust relationship between these variables.
本研究调查了在18个月期间，言语运动受累程度不同的脑瘫（CP）儿童在言语清晰度、元音空间和单词时长方面的纵向变化。该研究还考察了每个时间点各变量之间的关系。
22名脑瘫儿童参与了本研究（第一个时间点的平均年龄为50个月）。在相隔6个月的四个时间点收集言语样本。根据清晰度得分将儿童分为四个严重程度组。
随时间的变化因严重程度而异。没有言语运动受累的脑瘫儿童和轻度组儿童的言语清晰度有所提高，但元音空间面积或单词时长没有变化。中度组儿童没有显著变化，重度组儿童的元音空间增加，单词时长减少。在汇总所有儿童的数据后，每个时间点的言语清晰度和元音空间之间均存在显著正相关。
根据言语运动能力，儿童在言语清晰度、元音空间和单词时长方面表现出不同的随时间变化模式。跨严重程度组的言语清晰度和元音空间之间的关系是恒定的，表明这些变量之间存在稳固的关系。
