ACT-R을 통한 3차원 환경의 터치스크린 포인팅 수행 예측

Cognitive model which enables serious consideration of cognitive, perceptual and motor capabilities of human. One such model is ACT-R, which is described in detail. ACT-R is a production system architecture that has been augmented with a set of perceptual-motor modules designed to enable the detailed modeling of interactive tasks. ACT-R is able to predict human motor movement, in particular hand movement, computationally with motor module. However, the motor module of ACT-R is based on one-dimensional Fitts" law, therefore, for predicting more precisely human movement in a three-dimensions it is required to modify the motor module. In this study, we modified the motor module of ACT-R using extended Fitts" law, including the inclination angle and the azimuth angle, for predicting a pointing task in three-dimensions. Then, we implemented experiment to validate extended Fitts" law with comparing the empirical data and the model. Next, a three-dimensional pointing task on touchscreen was evaluated using the modified version of motor module. The result showed that revised ACT-R predicts accurately human"s pointing task in 3D environment.