Abstract
Psychophysics is an effective approach to measure events occurred in human mind, which is not observed from the outside. Since concentration is required to obtain reliable data from psychophysical experiments, volunteers participating in the experiments get tired. In order to obtain reliable data, we should estimate fatigue of the volunteers during psychophysical experiments. In this paper, we estimate the fatigue from variation in alpha-wave component obtained from a portable EEG (Mind tune, Toshiba). In the psychophysical experiments, volunteers perform to detect direction of edges, which are generated by a pin-matrix type tactile display. During the experiments, although the level of alpha-wave component decreased with increase of tasks, the level is recovered after a break. Therefore there is a possibility to measure the fatigue from level of alpha-wave component.
