Department of Psychology, University of Calgary, Calgary, Alberta, T2N 1N4 Canada.
J Exp Child Psychol. 2013 Dec;116(4):891-903. doi: 10.1016/j.jecp.2013.08.006. Epub 2013 Sep 27.
Typically developing infants differentiate strong-weak (trochaic) and weak-strong (iambic) stress patterns by 2months of age. The ability to discriminate rhythmical patterns, such as lexical stress, has been argued to facilitate language development, suggesting that a difficulty in discriminating stress might affect early word learning as reflected in vocabulary size. Children with autism spectrum disorder (ASD) often have difficulty in correctly producing lexical stress, yet little is known about how they perceive it. The current study tested 5-month-old infants with typically developing older siblings (SIBS-TD) and infants with an older sibling diagnosed with ASD (SIBS-A) on their ability to differentiate the trochaic and iambic stress patterns of the word form gaba. SIBS-TD infants showed an increased interest in attention to the trochaic stress pattern, which was also positively correlated with vocabulary comprehension at 12months of age. In contrast, SIBS-A infants attended equally to these stress patterns, although this was unrelated to later vocabulary size.
通常，婴儿在 2 个月大时就能区分强弱（重音）和弱强（抑扬）的重音模式。区分节奏模式（如词汇重音）的能力被认为有助于语言发展，这表明对重音的辨别困难可能会影响早期的单词学习，反映在词汇量上。自闭症谱系障碍（ASD）儿童在正确发出词汇重音方面往往有困难，但对于他们如何感知重音却知之甚少。本研究测试了有正常发育哥哥/姐姐的 5 个月大婴儿（TD-SIBS）和有被诊断为自闭症谱系障碍的哥哥/姐姐的婴儿（ASD-SIBS）对单词 gaba 的重音模式的区分能力。TD-SIBS 婴儿对重音模式的注意力增加，这与 12 个月时的词汇理解能力呈正相关。相比之下，ASD-SIBS 婴儿同样关注这些重音模式，尽管这与后来的词汇量无关。
