In a system having an interface utilizing electroencephalograms, a user's burden of calibration for accurately measuring electroencephalograms is eliminated, and it becomes possible to maintain a high distinction accuracy of electroencephalograms. An electroencephalogram interface (IF) system 1 includes an electroencephalogram IF section ( 13 ) for distinguishing a request of a user based on electroencephalograms, and identifies a function which is in accordance with the request. An electroencephalogram distinction method adjustment apparatus ( 2, 50 ) includes: an analysis section ( 14, 52 ) for detecting a change in a characteristic quantity of a stimulation given to the user, thus detecting a change in the stimulation; a storage section ( 15 ) for storing a waveform of an event-related potential during a period after a point in time when the change in the stimulation is detected; an extraction section ( 16 ) for extracting a characteristic quantity of the user based on the stored waveform; and an adjustment section ( 17 ) for, based on the extracted characteristic quantity, adjusting in the electroencephalogram IF section ( 13 ) a distinction method for a request based on an electroencephalogram signal.
ADJUSTING DEVICE FOR BRAIN WAVE IDENTIFICATION METHOD, ADJUSTING METHOD AND COMPUTER PROGRAM