Abstract
Quantitative evaluation of the concentration degree in psychophysical experiment is required because subjects’ physical and psychological conditions depend on daily status and individuals. In this study, we evaluate the concentration degree of experiments using a tactile mouse developed in previous study and tasks performed for a virtual object using it. For the evaluation, we used electroencephalogram (EEG), near infrared spectroscopy (NIRS) and hemoencephalography (HEG) as brain machine interfaces (BMI). By comparing results obtained from these BMIs, we explored a new effective method to evaluate the concentration degree. Using the tactile mouse, we perform a series of virtual contour tracking tests. As a result, as a common change in brain waves of the subjects, α-wave reduction was observed at the virtual object recognition. Unfortunately, we were not able to find the evidence of concentration from NIRS and HEG. However, this change in brain wave indicates that the subjects are stressed during the recognition, and it may evaluate the concentration degree from the α-wave reduction.
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