前方/側方/後方視野における両手動作認識・再現特性

抄録

In this paper, a “learning by observation” method, which is most commonly employed in motion learning, is examined. In the observation-based learning method, learners normally observe, recognize, and reproduce an avatar-performed reference motions only from one direction. The learners can observe the avatar from various directions: the orientation of the avatar’s trunk doesn’t accord with that of the learners when viewing from a direction other than from behind the avatar. It prevents the learners from learning the avatar’s reference motions easily because the learners need to rotate the avatar mentally (it is called the “mental rotation”). On the other hand, when viewing from behind the avatar in order to avoid the mental rotation cost, they occasionally encounter occlusion problem. Therefore, we have studied perceptual characteristics of various observation views through a psychophysical experiment. Two kinds of physical values were employed for evaluating learner’s responses. One is the delayed time of motion onset, and the other is the error rate of motion direction. The results suggest that the perception suffers ill-effects from the mental rotation in two ways: the amount of the mental rotation increases the delayed time, and the presence of the mental rotation causes the directional errors.