Fitts' Law is one among a small number of psychophysical laws. However, a fundamental variable in Fitts' Law-the movement distance, D-confounds two quantities: The physical distance the effector has to move to reach a goal, and the visually perceived distance to that goal. While these two quantities are functionally equivalent in everyday motor behavior, decoupling them might improve our understanding of the factors that shape speed-accuracy tradeoffs. Here, we leveraged the phenomenon of visuomotor gain adaptation to de-confound movement and visual distance during goal-directed reaching. We found that movement distance and visual distance can influence movement times, supporting a variant of Fitts' Law that considers both. The weighting of movement versus visual distance was modified by restricting movement range and degrading visual feedback. These results may reflect the role of sensory context in early stages of motor planning. (PsycInfo Database Record (c) 2024 APA, all rights reserved).

中文翻译：

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运动距离和视觉距离对费茨定律的独立影响。


费茨定律是少数心理物理学定律之一。然而，菲茨定律中的一个基本变量——移动距离，D——混淆了两个量：效应器必须移动才能到达目标的物理距离，以及到该目标的视觉感知距离。虽然这两个量在日常运动行为中在功能上是等效的，但将它们解耦可能会提高我们对影响速度与精度权衡的因素的理解。在这里，我们利用视觉运动增益适应现象来消除目标导向到达过程中的运动和视觉距离的混淆。我们发现移动距离和视觉距离会影响移动时间，支持考虑两者的费茨定律的变体。通过限制运动范围和降低视觉反馈来修改运动与视觉距离的权重。这些结果可能反映了感觉环境在运动规划早期阶段的作用。 （PsycInfo 数据库记录 (c) 2024 APA，保留所有权利）。