Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : September 25, 2019 - September 27, 2019
The user perceives sensory information, such as sounds and vibrations, generated by the operation of mechanical mechanisms, in response to the operation input of many common products. With the digitization of products, the mechanical operation response is lost, as the sensory information associated with it cannot be obtained, and there is no confirmation of the completed operation. Adding a digital sound or vibration could solve this problem. The challenge, however, is designing an operation response without inducing any sense of discrepancy. The purpose of this study was to create a method of quantitative evaluation of the sense of discrepancy to the operation response and its time transition. We investigated the possibility of using the event-related potential (P300), believed to reflect attention to stimuli, as a quantitative evaluation method of the sense of discrepancy. Experiment 1: We studied the sense of discrepancy between the lack of operation response (sound, vibration), and the shutter operation of a mirrorless single-lens camera, using subjective evaluation and P300. We confirmed that the P300 amplitude corresponds to the sense of discrepancy degree. Experiment 2: With the mouse click being the operation sound, the attenuation of the P300 amplitude by the repeated operation was consistent with the subjective attention direction attenuation. We conclude, based on these results, that the P300 amplitude could help determine the sense of discrepancy to the operation response and its temporal transition.
