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Extended Fitts` Law for Three-Dimensional Environment
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 Title & Authors
Extended Fitts` Law for Three-Dimensional Environment
Cha, Yeon-Joo; Myung, Ro-Hae;
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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, and . Considering the starting point as the center of coordinates, is the angle between the positive z-axis and the target location and 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 and , 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 and the standard error of the residual between the measured movement time and the predicted value.
Fitts` law;Movement direction;3D;
 Cited by
다중작업에의 적용을 위한 Fitts' Law 확장 : 운전 중 IVIS 조작 작업을 대상으로,이민규;김희진;정민근;

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