Sidaway B
Department of Kinesiology, Long Field House, Louisiana State University, Baton Rouge, LA 70803, USA.
J Mot Behav. 1991 Jun;23(2):120-30. doi: 10.1080/00222895.1991.9942029.
Three experiments are reported that test the hypothesis that under certain conditions programming time is a function of the directional accuracy demand of a response, directional accuracy being quantified by the minimal angle subtended at the point of movement initiation by the circular targets within the response. Subjects in three simple reaction time experiments were required to tap a single target or a series of circular targets as rapidly as possible with a hand-held stylus. Experiments 1 and 3 showed that the subtended angle (SA) of a response can have a more powerful effect on programming time, as indexed by reaction time and premotor time, than the number of movement parts in the response. The results of Experiment 2 revealed that the locus of the directional accuracy effect was SA and not target size or movement distance. In all three experiments, response SA was a better predictor of programming time than was number of movement parts, target size, movement distance, movement time, and average movement velocity. The findings support the notion that constraints placed upon movement initiation by the directional accuracy demand of the task can play an important role in determining the length of the programming process.
本文报告了三项实验，这些实验检验了以下假设：在某些条件下，编程时间是反应定向精度要求的函数，反应的定向精度通过反应范围内圆形目标在运动起始点所张的最小角度来量化。在三项简单反应时实验中，要求受试者用手持触控笔尽可能快地点击单个目标或一系列圆形目标。实验1和实验3表明，反应的张角（SA）对编程时间（以反应时和运动前时间为指标）的影响可能比反应中运动部分的数量更大。实验2的结果表明，定向精度效应的位点是张角，而不是目标大小或移动距离。在所有三项实验中，反应张角比运动部分数量、目标大小、移动距离、移动时间和平均移动速度更能预测编程时间。这些发现支持了这样一种观点，即任务的定向精度要求对运动起始施加的限制在确定编程过程的时长方面可以发挥重要作用。
