A fundamental principle of human motor behavior states that the accuracy of targeted movements relates reciprocally to their speed. This is quantified by Fitts' Law, wherein movement time (MT) and index of difficulty (ID), the log_2 ratio of target distance (A) to target height (H) has logarithmic linear relationship; MT = a+b-log_2(2A/H) = a+b-ID. The slope, b (seconds/bits), measures targeting performance as the time spent at each difficulty level, expressed as bits of information to be processed by the neuromotor system [1, 2]. Fitts' paradigm is a common measure of the kinematic performance of the upper limb, but has not been applied to its dynamic performance. Herein, we developed a dynamic speed-accuracy trade-off (DSAT) test of grip force modulation, which can be used both for assessment and training.
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机译：人类运动行为的基本原理指出，目标运动的准确性与其运动速度成反比。这通过费茨定律进行量化，其中运动时间（MT）和难度指数（ID），目标距离（A）与目标高度（H）的log_2比具有对数线性关系; MT = a + b-log_2（2A / H）= a + b-ID。斜率b（秒/位）以在每个难度级别上花费的时间来衡量目标性能，表示为要由神经运动系统处理的信息位[1，2]。 Fitts的范例是对上肢运动学表现的一种常用量度，但尚未应用于其动态表现。本文中，我们开发了一种握力调制的动态速度精度折衷（DSAT）测试，该测试可用于评估和训练。
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