Bloorview Research Institute, Holland Bloorview Kids Rehabilitation Hospital, Toronto, Canada.
Department of Communication Sciences and Disorders, Faculty of Rehabilitation Medicine, University of Alberta, Edmonton, Canada.
J Fluency Disord. 2020 Dec;66:105800. doi: 10.1016/j.jfludis.2020.105800. Epub 2020 Nov 2.
Previous studies have associated developmental stuttering with difficulty learning new motor skills. We investigated non-speech motor sequence learning in children with persistent developmental stuttering (CWS), children who have recovered from developmental stuttering (CRS) and typically developing controls (CON).
Over the course of two days, participants completed the Multi-Finger Sequencing Task, consisting of repeated trials of a10-element sequence, interspersed with trials of random sequences of the same length. We evaluated motor sequence learning using accuracy and response synchrony, a timing measure for evaluation of sequencing timing. We examined error types as well as recognition and recall of the repeated sequences.
CWS demonstrated lower performance accuracy than CON and CRS on the first day of the finger tapping experiment but improved to the performance level of CON and CRS on the second day. Response synchrony showed no overall difference among CWS, CRS and CON. Learning scores of repeated sequences did not differ from learning scores of random sequences in CWS, CRS and CON. CON and CRS demonstrated an adaptive strategy to response errors, whereas CWS maintained a high percentage of corrected errors for both days.
Our study examined non-speech sequence learning across CWS, CRS and CON. Our preliminary findings support the idea that developmental stuttering is not associated with sequence learning per se but rather with general fine motor performance difficulties.
先前的研究将发展性口吃与学习新运动技能的困难联系起来。我们研究了持续性发展性口吃（CWS）、从发展性口吃中恢复的儿童（CRS）和典型发展对照组（CON）的非言语运动序列学习。
在两天的时间里，参与者完成了多指序列任务，包括重复进行 10 个元素序列的试验，以及相同长度随机序列的试验。我们使用准确性和响应同步性来评估运动序列学习，这是一种用于评估序列定时的计时测量方法。我们检查了错误类型以及重复序列的识别和回忆。
在手指敲击实验的第一天，CWS 的表现准确性低于 CON 和 CRS，但在第二天提高到与 CON 和 CRS 的表现水平相当。响应同步性在 CWS、CRS 和 CON 之间没有总体差异。在 CWS、CRS 和 CON 中，重复序列的学习分数与随机序列的学习分数没有差异。CON 和 CRS 表现出对响应错误的适应性策略，而 CWS 在两天内都保持了较高的纠正错误率。
我们的研究在 CWS、CRS 和 CON 中检查了非言语序列学习。我们的初步发现支持这样一种观点，即发展性口吃不是与序列学习本身有关，而是与一般精细运动表现困难有关。
