Faculty of Health Sciences,University of Sydney.
J Child Lang. 2019 Jan;46(1):142-152. doi: 10.1017/S0305000918000272. Epub 2018 Sep 12.
In this exploratory study, we examined stress contrastivity within real word productions elicited via picture naming in 20 children with autism spectrum disorders (ASD) and 20 typical peers group-wise matched on age and vocabulary. Targets had a dominant pattern of lexical stress beginning with a strong-weak pattern (SW: 'caterpillar', 'butterfly') or a non-dominant pattern of lexical stress beginning with a weak-strong pattern (WS: 'tomato', 'potato'). Children produced each target twice (n = 320 productions). Acoustic measures were made for the duration, fundamental frequency, and intensity of the first two vowels for each word production. For vowel duration and fundamental frequency, children with ASD and typical peers produced a similar magnitude of stress contrastivity for SW and WS words. However, there was a significant group difference in the way contrastivity in intensity was realised for WS words whereby children with ASD produced less stress contrastivity than typical peers. Bayesian analyses were in line with our interpretation of our frequentist analyses.
在这项探索性研究中，我们通过图片命名来考察 20 名自闭症谱系障碍（ASD）儿童和 20 名在年龄和词汇量上与之匹配的典型同龄人在真实单词产生中的应激对比性。目标具有以强-弱模式（SW：“毛毛虫”、“蝴蝶”）为主导的词汇重音模式或以弱-强模式（WS：“西红柿”、“土豆”）为主导的非主导词汇重音模式。儿童们将每个目标重复两次（n = 320 次）。对于每个单词的产生，我们对前两个元音的持续时间、基频和强度进行了声学测量。对于元音持续时间和基频，ASD 儿童和典型同龄人在 SW 和 WS 单词上产生了相似程度的重音对比性。然而，在 WS 单词的强度对比性的实现方式上，两组存在显著差异，即 ASD 儿童的强度对比性小于典型同龄人。贝叶斯分析与我们对频率分析的解释一致。
