On the perception of incongruity; a paradigm.

Perceiving, for all its nicety of functioning in the dark room under strict instructions for accuracy, comprises a highly complex series of little understood psychological processes. For under all conditions, perceiving represents a resultant of two complex sets of specifications. One set describes the conditions of stimulation. This is done either in terms of physical measures such as wave length, or in terms of psychological norms such as in the description of a picture as that picture is seen by "normal" observers under optimal conditions and with a set for accuracy. This first set of specifications we are used to calling "stimulus" factors.