Cantin Noémi, Ryan Jennifer, Polatajko Helene J
Graduate Department of Rehabilitation Science, University of Toronto, 500 University Av., Toronto, ON M5G 1V7, Canada.
Rotman Research Institute, Baycrest, 3560 Bathurst St, Toronto, ON M6A 2E1, Canada; Department of Psychology, University of Toronto, 250 College Street, Toronto, ON M5T 1R8, Canada; Department of Psychiatry, Division of Geriatric Psychiatry, University of Toronto, 250 College Street, Toronto, ON M5T 1R8, Canada.
Hum Mov Sci. 2014 Apr;34:217-32. doi: 10.1016/j.humov.2014.02.006. Epub 2014 Apr 4.
Given the well-acknowledged visual-motor difficulties of children with developmental coordination disorder (DCD), it is surprising to find few research studies systematically exploring their visual-motor task performance.
To describe the impact of task difficulty and motor ability on visual-motor task performance in children with and without DCD.
Twenty-four children (8years 11months to 12years 11months) were recruited: 12 children with DCD, 12 children developing typically with regards to their motor skills. A computer-based aiming task completed with three different cursor controls of increasing levels of difficulty was designed for this study. Mixed-effect modeling analyses were performed to describe the influence of motor ability and task difficulty on visual-motor task performance.
Motor ability modulated the impact of task difficulty on visual-motor task performance. Children with DCD were as fast and as accurate as their peers in their initial performance of the simple task. However, they were slower and less accurate when performing the complex and novel visual-motor task.
While children with DCD can generally be characterized as less accurate and slower than their peers, this characterization needs to be specified and qualified; it is probably best not applied to a well-learned, simple task.
鉴于发育性协调障碍（DCD）儿童存在公认的视动困难，令人惊讶的是，很少有研究系统地探究他们的视动任务表现。
描述任务难度和运动能力对患有和未患有DCD的儿童视动任务表现的影响。
招募了24名儿童（8岁11个月至12岁11个月）：12名患有DCD的儿童，12名运动技能发育正常的儿童。本研究设计了一项基于计算机的瞄准任务，该任务通过三种难度逐渐增加的不同光标控制来完成。进行了混合效应模型分析，以描述运动能力和任务难度对视动任务表现的影响。
运动能力调节了任务难度对视动任务表现的影响。患有DCD的儿童在简单任务的初始表现中与同龄人一样快速且准确。然而，在执行复杂和新颖的视动任务时，他们的速度较慢且准确性较低。
虽然患有DCD的儿童通常被认为比同龄人准确性更低、速度更慢，但这种描述需要具体说明和限定；可能最好不要应用于熟练掌握的简单任务。
