Darling-White Meghan, Sisk Christine N
Department of Speech, Language, and Hearing Sciences, University of Arizona, Tucson.
Am J Speech Lang Pathol. 2024 Jul 4;33(5):1-18. doi: 10.1044/2024_AJSLP-23-00183.
The categorization of silent intervals during speech production is necessary for accurate measurement of articulation rate and pauses. The primary purpose of this preliminary study was to examine the within-word silent interval associated with the stop closure in word-final stop consonants produced by children with and without neurodevelopmental disorders.
Seven children diagnosed with either cerebral palsy or Down syndrome (i.e., children with neurodevelopmental disorders) and eight typically developing children produced a reading passage. Participants were between the ages of 11 and 16 years. Fifty-eight words from the reading passage were identified as having word-final stop consonants. The closure duration of the word-final stop consonant was calculated, both in absolute duration and percent pause time. The articulation rate of the entire passage was calculated. The number of closure durations that met or exceeded the minimum duration threshold to be considered a pause (150 ms) was examined descriptively.
Children with neurodevelopmental disorders produced significantly longer closure durations and significantly slower articulation rates than typically developing children. Children with neurodevelopmental disorders produced closure durations that met or exceeded the minimum duration threshold of a pause, but typically developing children, generally, did not.
These data indicate the need to examine the location of silent intervals that meet the minimum duration threshold of a pause and correct for articulatory events during the measurement of articulation rate and pauses in children with neurodevelopmental disorders.
言语产生过程中无声间隔的分类对于准确测量发音速率和停顿是必要的。这项初步研究的主要目的是检查患有和未患有神经发育障碍的儿童在词尾塞音中与塞音闭塞相关的词内无声间隔。
七名被诊断患有脑瘫或唐氏综合征的儿童（即患有神经发育障碍的儿童）和八名发育正常的儿童朗读了一篇文章。参与者年龄在11至16岁之间。从朗读文章中识别出58个词尾有塞音的单词。计算词尾塞音的闭塞持续时间，包括绝对持续时间和停顿时间百分比。计算整篇文章的发音速率。对达到或超过被视为停顿的最短持续时间阈值（150毫秒）的闭塞持续时间数量进行描述性检查。
患有神经发育障碍的儿童产生的闭塞持续时间明显更长，发音速率明显更慢。患有神经发育障碍的儿童产生的闭塞持续时间达到或超过了停顿的最短持续时间阈值，但发育正常的儿童通常没有。
这些数据表明，在测量患有神经发育障碍儿童的发音速率和停顿时，有必要检查达到停顿最短持续时间阈值的无声间隔的位置，并对发音事件进行校正。
