The present invention provides discernment technology that makes it possible to discern, for a variety of sensations, whether a sensation is a pleasant (comfortable) sensation or a sensation of discomfort. The present invention provides a method for generating a means for discerning the stress or comfort/discomfort of a subject, the method comprising: a) imparting, to a subject, an identical stimulation under at least two environments, and obtaining brain wave data or analysis data thereof for each environment； b) correlating a reaction of the subject relating to the stimulation and the difference of the brain wave data or analysis data thereof obtained under the at least two environments； c) generating a comfort/discomfort discernment means for discerning the stress or comfort/discomfort of the subject, on the basis of the correlation； and d) performing comfort/discomfort discernment using a basic step for amplifying a sample from a small stimulation.
