Extended Fitts' Law for Three-Dimensional Environment

Title & Authors
Extended Fitts' Law for Three-Dimensional Environment
Cha, Yeon-Joo; Myung, Ro-Hae;

Abstract
This study explored an extended three-dimensional Fitts' law that is more suited for the pointing task than the conventional Fitts' law. The experiments were conducted under the manipulation of the distance to the target, size of the target, and direction of the target's location that can be described by two angles, $\small{\theta1}$ and $\small{\theta2}$. Considering the starting point as the center of coordinates, $\small{\theta1}$ is the angle between the positive z-axis and the target location and $\small{\theta2}$ is the angle between the positive y-axis and the projected target location on the x-y plane. From the experimental results, we confirmed that all four variables significantly affect the movement time. As we extended the index of difficulty of the conventional Fitts' model by incorporating $\small{\theta1}$ and $\small{\theta2}$, we established an extended Fitts' model that showed better accordance with the empirical data than the conventional Fitts' model and 3D Fitts' law of Murata and Iwase, in terms of the $\small{r^2}$ and the standard error of the residual between the measured movement time and the predicted value.
Keywords
Fitts' law;Movement direction;3D;
Language
Korean
Cited by
1.
다중작업에의 적용을 위한 Fitts' Law 확장 : 운전 중 IVIS 조작 작업을 대상으로,이민규;김희진;정민근;

대한산업공학회지, 2014. vol.40. 3, pp.267-274
1.
Extended Fitts' Law for Dual Task : Pointing on IVIS during Simulated Driving, Journal of Korean Institute of Industrial Engineers, 2014, 40, 3, 267
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