a. Of or pertaining to psychophysics; involving the action or mutual relations of the psychical and physical in man. [ 1913 Webster ]

Psychophysical time (Physiol.), the time required for the mind to transform a sensory impression into a motor impulse. It is an important part of physiological or reaction time. See under Reaction. [ 1913 Webster ]

n. [ Psycho- + physics. ] The science of the connection between nerve action and consciousness; the science which treats of the relations of the psychical and physical in their conjoint operation in man; the doctrine of the relation of function or dependence between body and soul. [ 1913 Webster ]