ABSTRACT
The objective of this study is to clarify the perceptual mechanism for dynamic touch. In this study, the relation between the perceived length and moment of inertia of a rod about the elbow joint was analyzed for three arm posture. Ten university students participated in the experiment. The subjects vertically wielded nine kinds of rods using their elbows for a short distance; this was possible because their wrists and upper arms were fixed. For comparison, they held the rods statically. The perceived length of rod was not different for wielding and holding. However, the perceived length was greater for greater arm extension. Moreover, the simple regression of the perceived length on the static moment and moment of inertia of the rod about its center of mass (eM), wrist, and elbow was investigated. The contributing ratio of the static moment for holding was lower than that for wielding. The contributing ratios of the moments of inertia about the eM and about the wrist were higher than that about the elbow.
