PROBLEM TO BE SOLVED: To detect a nictation or sight line movement properly.SOLUTION: A signal processing method comprises: an acquisition step of acquiring an eye potential related signal on an eye potential to be detected by the individual electrodes to contact the peripheries of the eyes of an object person by a computer a first calculation step for calculating an extreme difference signal between the extreme value of the eye potential related signal and another extreme value before the extreme value and a detection step of detecting the movement or the nictation of the sight line on the basis of the extreme difference signal.SELECTED DRAWING: Figure 8COPYRIGHT: (C)2018,JPO&INPIT【課題】瞬目又は視線移動を適切に検出する。【解決手段】信号処理方法は、コンピュータが、対象者の眼周辺に接触する各電極により検出される眼電位に関する眼電位関連信号を取得する取得ステップと、眼電位関連信号の極値と、極値以前の他の極値との極値差信号を算出する第1算出ステップと、極値差信号に基づいて、視線移動又は瞬目を検出する検出ステップと、を実行する。【選択図】図8
