The crucial role of nonverbal communication by gaze in social interactions has been highlighted. In this study, an eye robot having two degrees-of-freedom was developed as a communication robot, and the motion of the sight line of this robot in a standby state with an absence of communication with people was investigated. We compared and evaluated the impression provided by a robot and a person, who imitated the action of the robot, to observers and demonstrated that both the robot and person provided improved impression if the line of sight is stationary.

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