PROBLEM TO BE SOLVED: To determinate the attentional state of a user with enough accuracy even when there are a lot of situation changes by shortening an analysis time interval of eye fixation-related potential (EFRP).SOLUTION: An attentional state determination system 1 includes: a brain wave measurement section 20 for measuring a brain wave signal an eye movement measuring section 30 for measuring the movement of an eye ball a saccade detector 40 for detecting a plurality of eye ball stopping start times that are when the saccade of the eye ball ends and a plurality of movement amounts of the saccade by using the movement of the eye ball a classification section 60 for specifying a direction of each saccade based on the movement amount of each saccade, and classifying that the direction of the each specified saccade, that adds and averages the eye ball stopping potential obtained from the brain wave signal for each classified direction, assuming the eye ball stopping start time corresponding to each saccade as the origin an attention amount determining section 70 for determining an attentional state of each classified direction based on the eye fixation-related potential which has been added and averaged and an integrally determination section 80 for determining the attentional state by using the determination results in the attentional state of each direction.COPYRIGHT: (C)2012,JPO&INPIT【課題】眼球停留関連電位(EFRP)の解析区間を短縮し、状況変化が多い場合でも十分な精度でユーザの注意状態を判別する。【解決手段】注意状態判別システム1は、脳波信号を計測する脳波計測部20と、眼球の運動を計測する眼球運動計測部30と、眼球の運動を用いて、眼球のサッケードが終了した時刻である眼球停留開始時刻およびサッケードの移動量を複数検出するサッケード検出部40と、各サッケードの移動量に基づいて各サッケードの方向を特定し、特定された各サッケードの方向を分類する分類部であって、分類された方向ごとに、各サッケードに対応する眼球停留開始時刻を起点として脳波信号から切り出した眼球停留電位を加算平均する分類部60と、加算平均された眼球停留関連電位に基づいて、分類された方向ごとの注意状態を判別する注意量判別部70と、方向ごとの注意状態の判別結果を用いて、注意状態を判別する統合判定部80とを備えている。【選択図】図7
