Stimulating task presentation device and a stimulating task presentation method in a biological optical measurement device

Resting challenges to exclude the load irritation problems to the subject remains unstable, allowing measure an accurate response to the stimulus challenge coloration of the subject. A stimulation presenting unit that presents a stimulus to the subject, in parallel with the presentation of the stimulus, the a brain function measuring device for measuring the brain function of a subject, stimulus presentation control for controlling the stimulus the stimulation presenting unit presents and a section, wherein the stimulation presentation controller, the ability to set resting problems and irritation problem of presenting to the subject, a function of detecting the response of the resting task and the stimulating task against the subject, the detection result to perform the determination of the stability at the time of presentation of the resting task based, the basis of the degree of stability, optical measurement and a problem presentation control function for controlling presentation of the resting task or the stimulating task stimulating task presentation device in the apparatus.