Evaluation of feedback conditions in the noncontact operation

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We evaluated usability by feedback of human senses ("Sight", "Hearing", and "Haptics") in non-contact operation system using non-contact display. We performed the experiments in conditions of single, double and all human senses (totally seven conditions). In the experiments, distance between feedback threshold and reaction points, number of operation error and time of operation task were used as evaluation measurements. And we performed the experiment with changing number of tiles for 3 days. There were differences significantly between some feedback conditions. These combination of feedback conditions are "Sight" and "Hearing", "Sight" and "Touch", "Sight" and "Hearing, Touch" feedback conditions. From the result, we consider that feedbacks including Sight is effective in non-contact operation system.

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