Effective adaptation to experience of different-sized hand

This paper reports the effect of pre-operation intended to familiarizing oneself with vicarious experiences of different-sized hands. To measure this effect, the index of degree of immersion (DOI) is proposed, which represents whether observed behavior is appropriate for the presented hand size. The DOI is measured for various sizes of hands when changing type of pre-operation which is classified based on relationship between hands and objects. The experimental results show that the pre-operation is effective for familiarizing the presented sized hand, especially in larger sized hands, and that behavior of touching and controlling an object in position is important for effective pre-operation.