Latash M, Gottleib G
Biofizika. 1990 Sep-Oct;35(5):870-4.
Problems of single-joint movement variability are analysed in the framework of the equilibrium-point hypothesis (the lambda-model). Control of the movements is described with three parameters related to movement amplitude speed, and time. Three strategies emerge from this description. Only one of them is likely to lead to a Fitts' type speed-accuracy trade-off. Experiments were performed to test one of the predictions of the model. Subjects performed identical sets of single-joint fast movements with open or closed eyes and some-what different instructions. Movements performed with closed eyes were characterized with higher peak speeds and unchanged variability in seeming violation of the Fitt's law and in a good correspondence to the model.
在平衡点假设（λ模型）的框架内分析了单关节运动变异性问题。用与运动幅度、速度和时间相关的三个参数来描述运动控制。从这一描述中得出了三种策略。其中只有一种可能导致菲茨类型的速度-准确性权衡。进行实验以检验该模型的一个预测。受试者在睁眼或闭眼以及略有不同的指令下进行相同组的单关节快速运动。闭眼进行的运动表现为峰值速度更高且变异性不变，这似乎违反了菲茨定律，但与模型高度相符。
