PROBLEM TO BE SOLVED: To provide an interference effect measuring technique based on an index different from prior art, and an audiometric technique using the interference effect.SOLUTION: A perception sensitivity evaluation device includes means to present light stimulus to a subject, means to present sound stimulus to the subject, means to acquire a response time by acquiring motion information of a subjects response while the light stimulus and the sound stimulus are presented, and means to obtain a difference between an occurrence time of the light stimulus and that of the sound stimulus and a difference between the occurrence time of the light stimulus and a response time.SELECTED DRAWING: Figure 9
