To permit a subject's concentration to be accurately computed.
The concentration computing system measures ocular mobility by an ocular mobility measuring instrument 12 and measures an electroencephalographic signal by an electroencephalogram measuring instrument 14. The system decides that a saccade occurs on the basis of measured ocular mobility, detects the time when the saccade ends, and extracts the time-series data of the electroencephalographic signal within a prescribed period of time from the time when the saccade ends by a signal extraction section 20 every time the saccade occurs. The system adds and averages the time-series data extracted by the signal extraction section 20 and detects a peak-to-peak value showing the difference between the maximum value and the minimum value of the electroencephalographic signal for the added and averaged time-series data by a peak value detection section 22. The system computes an operator's degree of concentration of attention by multiplying the detected peak-to-peak value by the number of times the saccade occurs by an attention concentration computing section 24.
EBE KAZUTOSHI
Kato Kazunori