In a system having an interface that utilizes an electroencephalogram, there is realized a calibration which prevents overlooking of calibrational stimulations concerning the electroencephalogram and which is highly accurate. An electroencephalogram interface system (1) includes an interface section (100) which acquires an electroencephalogram signal from a user, distinguishes a P3 component of a visual event-related potential contained in the electroencephalogram signal after a manipulation menu is presented, and operates a device based on the distinguished P3 component. An electroencephalogram distinction method adjustment apparatus (10) is used for adjusting a distinction method in the interface section (100). Based on a database (13) defining a correlation between a P3 component of an event-related potential obtained from a stimulation to a modality other than the visual sense and a P3 component of a visual event-related potential and on a P3 component of an event-related potential after a stimulation is presented, the apparatus (10) derives a characteristic quantity of the user concerning the P3 component of the visual event-related potential, and adjusts the electroencephalogram distinction method in the interface section (100) based on the characteristic quantity.
Brain wave identification method adjusting device and method