An evaluation device includes a display unit; a point-of-gaze detector configured to detect a position of a point of gaze of a subject on the display unit; a display controller configured to display, on the display unit, an image containing an induction area that tends to induce visual hallucinations in the subject; a determination unit configured to, based on position data on the point of gaze, determine whether the point of gaze is staying; an area detector configured to, when the determination unit determines that the point of gaze is staying, calculate an area of staying in which the point of gaze is staying in the display unit; an acquisition unit configured to acquire a feature value representing a state of display of the area of staying that is calculated by the area setting unit; and an evaluation unit.
EVALUATION DEVICE, EVALUATION METHOD, AND MEDIUM