Shinkfield A J, Sparrow W A, Day R H
Deakin University, School of Studies in Disability, Victoria, Australia.
Am J Ment Retard. 1997 Sep;102(2):172-81. doi: 10.1352/0895-8017(1997)102<0172:VDAMRO>2.0.CO;2.
Visual discrimination and motor reproduction tasks involving computer-simulated arm movements were administered to 12 adults with mental retardation and a gender-matched control group to examine whether inadequacies in visual perception account for the poorer motor performance of individuals with mental retardation. In the discrimination phase subjects judged whether simulated arm movements were either of greater or lesser extent or shorter or longer in duration, respectively, than those of a standard display. In the reproduction phase accuracy in reproducing the movement in the standard display was measured. Results indicate that error in discriminating extent and duration was significantly greater for the individuals with mental retardation, who were also less accurate and more variable in matching the extent and duration of the standard displays. These outcomes implicate both perceptual and motor-reproduction inadequacies in skill acquisition for these individuals.
对12名智力障碍成年人及一个性别匹配的对照组进行了涉及计算机模拟手臂运动的视觉辨别和运动再现任务，以检验视觉感知不足是否是智力障碍者运动表现较差的原因。在辨别阶段，受试者分别判断模拟手臂运动的幅度是大于还是小于标准展示的幅度，以及持续时间是短于还是长于标准展示的持续时间。在再现阶段，测量再现标准展示中运动的准确性。结果表明，智力障碍者在辨别幅度和持续时间方面的误差明显更大，他们在匹配标准展示的幅度和持续时间时也更不准确且更具变异性。这些结果表明，这些个体在技能习得过程中存在感知和运动再现方面的不足。
