Department of Speech, Language, & Hearing Sciences, Boston University, Boston, MA 02215, USA.
Department of Speech, Language, & Hearing Sciences, Boston University, Boston, MA 02215, USA; Department of Biomedical Engineering, Boston University, Boston, MA 02215, USA.
J Fluency Disord. 2022 Dec;74:105928. doi: 10.1016/j.jfludis.2022.105928. Epub 2022 Aug 27.
Prior work has shown that Adults who stutter (AWS) have reduced and delayed responses to auditory feedback perturbations. This study aimed to determine whether external timing cues, which increase fluency, resolve auditory feedback processing disruptions.
Fifteen AWS and sixteen adults who do not stutter (ANS) read aloud a multisyllabic sentence either with natural stress and timing or with each syllable paced at the rate of a metronome. On random trials, an auditory feedback formant perturbation was applied, and formant responses were compared between groups and pacing conditions.
During normally paced speech, ANS showed a significant compensatory response to the perturbation by the end of the perturbed vowel, while AWS did not. In the metronome-paced condition, which significantly reduced the disfluency rate, the opposite was true: AWS showed a significant response by the end of the vowel, while ANS did not.
These findings indicate a potential link between the reduction in stuttering found during metronome-paced speech and changes in auditory motor integration in AWS.
先前的研究表明，口吃成人（AWS）对听觉反馈干扰的反应减少且延迟。本研究旨在确定是否外部定时线索可以增加流畅度，从而解决听觉反馈处理障碍。
15 名 AWS 和 16 名不口吃的成年人（ANS）以自然的重音和节奏或使用节拍器以每个音节的速度朗读一个多音节句子。在随机试验中，应用听觉反馈共振峰干扰，并比较组间和节奏条件下的共振峰反应。
在正常节奏的语音中，ANS 在受干扰元音结束时表现出显著的补偿反应，而 AWS 则没有。在显著降低不流畅率的节拍器节奏条件下，情况正好相反：AWS 在元音结束时表现出显著的反应，而 ANS 则没有。
这些发现表明，在节拍器节奏的语音中发现的口吃减少与 AWS 中听觉运动整合的变化之间存在潜在联系。
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