van der Meulen J H, Denier van der Gon J J, Gielen C C, Gooskens R H, Willemse J
Department of Child Neurology, University Hospital Utrecht, The Netherlands.
Dev Med Child Neurol. 1991 Feb;33(2):118-29. doi: 10.1111/j.1469-8749.1991.tb05090.x.
Tracking performance was investigated in normal and clumsy children in two age-groups, six to seven and 10 to 11 years. Target signals moving unpredictably along a straight line had to be tracked, both with and without visual feedback. Performance was described in three ways: (1) performance in the low-frequency range (LF); (2) the delay between target signal and tracking movement (DL); and (3) a measure of tracking quality or over-all similarity in the shape of target signal and tracking movement (Q). Clumsy children in both age-groups had a lower tracking quality (Q) and longer delay (DL) than the normal children. Disturbances in the regulation of attention seemed to affect tracking performance, particularly of the six- to seven-year-old clumsy children. There was no significant difference between normal and clumsy children in the effect of visual feedback on tracking performance. This suggests that clumsiness is not linked to disturbance of integration of visual feedback information and motor processes.
研究了6至7岁和10至11岁两个年龄组的正常儿童和动作笨拙儿童的跟踪能力。目标信号沿直线做不可预测的移动，分别在有和没有视觉反馈的情况下进行跟踪。跟踪能力通过三种方式来描述：（1）低频范围内的跟踪能力（LF）；（2）目标信号与跟踪动作之间的延迟（DL）；以及（3）跟踪质量的一种度量，即目标信号形状与跟踪动作形状的总体相似性（Q）。两个年龄组的动作笨拙儿童的跟踪质量（Q）都低于正常儿童，延迟（DL）也更长。注意力调节方面的障碍似乎会影响跟踪能力，尤其是6至7岁的动作笨拙儿童。在视觉反馈对跟踪能力的影响方面，正常儿童和动作笨拙儿童之间没有显著差异。这表明动作笨拙与视觉反馈信息和运动过程整合的障碍没有关联。
