The auditory event-related potential measurement system includes: a size determination section for determining a size of a region within a video to be presented to a user so that the region has a viewing angle between diagonal corners in a range greater than 2 degrees and smaller than 14 degrees a video output section for presenting to the user a video including a region of the size determined by the size determination section an auditory stimulation output section for presenting an auditory stimulation to the user during a period in which the video is being presented to the user a biological signal measurement section for measuring an electroencephalogram signal of the user and an electroencephalogram processing section for acquiring an event-related potential from the electroencephalogram signal as reckoned from a point in time at which the auditory stimulation is presented.
