Beamish Dan, Bhatti Shabana Ali, MacKenzie I Scott, Wu Jianhong
Academy of Mathematics and Systems Science, Chinese Academy of Sciences, Beijing 100080, People's Republic of China.
J R Soc Interface. 2006 Oct 22;3(10):649-54. doi: 10.1098/rsif.2006.0123.
An intrinsic property of human motor behaviour is a trade-off between speed and accuracy. This is classically described by Fitts' law, a model derived by assuming the human body has a limited capacity to transmit information in organizing motor behaviour. Here, we propose an alternative foundation, based on the neurodynamics of the motor circuit, wherein Fitts' law is an approximation to a more general relationship. In this formulation, widely observed inconsistencies with experimental data are a consequence of psychomotor delay. The methodology developed additionally provides a method to estimate the delay within the motor circuit from the speed-accuracy trade-off alone.
人类运动行为的一个内在特性是速度与准确性之间的权衡。这一特性经典地由菲茨定律描述，该模型是通过假设人体在组织运动行为时传递信息的能力有限而推导出来的。在此，我们基于运动回路的神经动力学提出了一种替代基础，其中菲茨定律是一种更普遍关系的近似。在这种表述中，广泛观察到的与实验数据的不一致是心理运动延迟的结果。此外，所开发的方法还提供了一种仅从速度-准确性权衡来估计运动回路内延迟的方法。
