Patent ID: 8326409

Claim:
An adjustment apparatus for use in an electroencephalogram interface system, the electroencephalogram interface system having: an output section for visually presenting a manipulation menu for a device, a biological signal measurement section for acquiring an electroencephalogram signal from a user, and an electroencephalogram interface section for presenting via the output section a plurality of menu items of the manipulation menu in a regular order, distinguishing by a previously determined distinction method a component of an event-related potential which is contained in the electroencephalogram signal after each menu item is highlighted, and operating the device based on the distinguished event-related potential, the adjustment apparatus adjusting the distinction method in the electroencephalogram interface section, wherein the distinction method is a method of distinguishing the component of the event-related potential depending on whether the electroencephalogram signal satisfies a predetermined criterion or not, the adjustment apparatus for the electroencephalogram distinction method comprising: an analysis section for determining a gradient of a waveform of the event-related potential before the menu item is highlighted; and a determination section for comparing the gradient of the waveform as determined by the analysis section against a threshold value, and determining that the menu item corresponding to the gradient is a menu item which the user wishes to select based on a result of comparison.