Weight illusion by tangential deformation of forearm skin

When we perform exercise or undergo rehabilitation, it is helpful to be supported by another person. To get this support, we normally take hold of a person's arm, and pull it. In this paper, we investigate the use of a special device to produce a "pulling arm" sensation on the forearm. Using a weight comparison task, we performed an experiment to confirm the sensation of illusory external force with our device. We concluded that our current device presented about 10g to 20g weight perception.