A study on imitation motion based on imitated person´s view - Finding out the differences between imitation and non-imitation

This paper considers the selection of feature points about the imitation motion when the subject felt to have been imitated by another person, in the scene of real time imitation on the body motion. There are many researches regarding imitation motion, most of them consider it from the view point of the person imitating another person´s motion. The imitation motion is cooperative motion by both persons who are the person imitating and the person being imitated. It is, therefore, worth to consider the imitation motion from the view point of the person being imitated. Thus, this paper considers an imitation motion from the view point of the person being imitated under the conditions that the person being imitated can recognize own posture by own somatic sensation and can recognize motion of another person by own visual sensation. In particular, this paper tries to select the feature points of the imitation motion based on human motion and sensation. As a results of experiment, it turned out that the person tends to feel that the motion of another person was not imitation motion if a delay of the motion was increased. However, the amplitudes of the motion did not affect the impression of the person being imitated. Therefore, this paper concludes that the feature point on imitation motion is the phase difference (delay) between the motions of another person and subject.