Abstract
In this paper, we experimentally investigate the cooperative balancing task on a virtual coupled inverted pendula (CIP) model, performed by a pair of an invisible artificial controller and a human subject, where experimental participants were not allowed to watch the movement of the artificial partner during experiments. The experimental result on Lyapunov exponents implies that the human subjects who never have experienced the balancing tasks with visible controller, seems to try to make the artificial controller neutrally stable as well as the subjects who have already experienced. Therefore, the result implies that at least as to the human subjects in the present study, there are no influence of learning with the visible controller on the stabilities of the task with invisible controller.
