Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : November 26, 2020 - November 28, 2020
The trade-off relationship between speed and accuracy has been well known in motor tasks. An error of a movement increases as speed of a movement. Fitts’ law formulizes the relationship between speed and accuracy. A number of studies have confirmed the validity of Fitts’ law in many kinds of motor tasks, although the reason why the law can give good regression of a movement duration on speed and accuracy of the movement has not been cleared. In this study, the influence of dynamics parameters of arms, the magnitude of signal-dependent noise, and a criterion of movement smoothness on Fitts’ law was investigated to gain the sight with regard to the speed-accuracy trade-off. Computer simulations of a reciprocal tapping task were examined, and as a result, it was revealed that the joint viscosity of arms affects the regression fitness based on Fitt’s law, in particular negative viscosity breaks down it.
