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It has been reported that operating efficiency for teleoperations using stereoscopic video images is lower than that using the naked eye in real environments. Here, the authors tried to improve the hu...man-machine interface of teleoperational system in order to achieve a higher operating efficiency for stereoscopic video images by adding other information. An experiment was carried out under the two following conditions: Condition 1 was only stereoscopic vision. Condition 2 was that tactual feedback was given through a vibration device put on the subject's hand, as one object touched another. The vibration device consisted of a small motor, and vibrated when objects touched each other. The subject's task was to insert a cylindrical object into a round hole. The completion time, when tactual feedback was provided (Condition 2), was shorter than when no additional information was provided (Condition 1). This result leads to the conclusion that the efficiency becomes higher by the vibration device.show more
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