PROBLEM TO BE SOLVED: To estimate using a new feature amount based on a relationship of both eyes.SOLUTION: A feature amount extraction device obtains a third feature amount depending on a relative amount of a first feature amount obtained based on a kinetic change of one eye of a subject to a second feature amount obtained based on a kinetic change of the other eye of the subject.SELECTED DRAWING: Figure 1【課題】両眼の関係に基づく新たな特徴量を用いた推定を行う。【解決手段】対象者の一方の眼の動的な変化に基づいて得られた第１特徴量と、当該対象者の他方の眼の動的な変化に基づいて得られた第２特徴量と、の相対量に応じた第３特徴量を得る。【選択図】図１
