PROBLEM TO BE SOLVED: To provide a technology to evaluating perception that does not depend on a response from an object person, does not need a value of a delay of sound to light, and does not necessarily need presentation of light stimulation.SOLUTION: A perception sensitivity evaluation device includes an input information acquisition part for acquiring a time sequence of motion information on an object person performing a predetermined action to a first rhythm, which is a fixed rhythm, and an interference effect measurement part for measuring an interference effect based on intervals of the time that the object person performs a predetermined action before and after sound stimulation is presented with a second rhythm when the sound stimulation is presented to the object person performing the predetermined action to the first rhythm with the second rhythm, which is different from the first rhythm, and determining that the sound stimulation is perceived when the interference effect is generated.SELECTED DRAWING: Figure 4
