Acquisition of Voice Onset Time in Toddlers at High and Low Risk for Autism Spectrum Disorder
Acquisition of Voice Onset Time in Toddlers at High and Low Risk for Autism Spectrum Disorder
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DOI：
10.1002/aur.1775
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发表时间：
2017-07-01
期刊：
影响因子：
4.7
通讯作者：
Tager-Flusberg, Helen
中科院分区：
文献类型：
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作者：
Chenausky, Karen;Tager-Flusberg, Helen
虽然语言延迟在自闭症谱系障碍（ASD）中很常见，但关于言语发育是否受到影响的研究模棱两可。我们使用声学方法来调查存在的亚知觉差异的语音发展ASD的幼儿。在22名ASD低风险幼儿（LRC）、22名无ASD的ASD高风险幼儿（HRA2）和11名在36个月时被诊断为ASD的ASD高风险幼儿（HRA1）中前瞻性跟踪了B和p之间区别的发展。声音起始时间（VOT），B和p之间的主要声学差异，在18个月，24个月和36个月的自发产生的话进行了测量。还评估了单词数量、音节首字母B和p的标记（实例）数量、错误率、语言评分和运动能力。所有组的平均语言得分均在平均范围内或略高。两组间在单词数、B、p或错误数、VOT的平均值或标准差方面没有发现差异。二元逻辑回归分析表明，只有诊断状态，而不是语言得分，运动能力，单词的数量，B和p的数量，或错误的数量显着预测是否一个蹒跚学步的孩子在36个月的声音产生不同的B和p人口。HRA 1幼儿在36个月时产生声学上不同的B和p的可能性显著降低，这可能表明HRA 1组可能使用不同的策略来产生这种区别。(C)2017年国际自闭症研究学会，Wiley Periodicals，Inc。
Although language delay is common in autism spectrum disorder (ASD), research is equivocal on whether speech development is affected. We used acoustic methods to investigate the existence of sub-perceptual differences in the speech of toddlers who developed ASD. Development of the distinction between b and p was prospectively tracked in 22 toddlers at low risk for ASD (LRC), 22 at high risk for ASD without ASD (HRA2), and 11 at high risk for ASD who were diagnosed with ASD at 36 months (HRA1). Voice onset time (VOT), the main acoustic difference between b and p, was measured from spontaneously produced words at 18, 24, and 36 months. Number of words, number of tokens (instances) of syllable-initial b and p produced, error rates, language scores, and motor ability were also assessed. All groups' mean language scores were within the average range or slightly higher. No between-group differences were found in number of words, b's, p's, or errors produced; or in mean or standard deviation of VOT. Binary logistic regression showed that only diagnostic status, not language score, motor ability, number of words, number of b's and p's, or number of errors significantly predicted whether a toddler produced acoustically distinct b and p populations at 36 months. HRA1 toddlers were significantly less likely to produce acoustically distinct b's and p's at 36 months, which may indicate that the HRA1 group may be using different strategies to produce this distinction. (C) 2017 International Society for Autism Research, Wiley Periodicals, Inc.