Main Entry: psy·cho·phys·ics Pronunciation: "sI-kO-'fiz-iks Function: noun plural but singular in construction : a branch of psychologyconcerned with the effect of physical processes (as intensity of stimulation) on the mental processes and especially sensations of an organism
psychophysics psy·cho·phys·ics (sī'kō-fĭz'ĭks) n. The branch of psychology that deals with the relationships between physical stimuli and sensory response.