1. any change in a percept generated by (i) an addition to, elimination from, or modification in a physical stimulant or (ii) a novel understanding of the stimulant, a modification in a group or outlook, or an abrupt insight regarding the material. 2. modification in the way a dilemma, occurrence, or individual is comprehended by the including of new data or a varying viewpoint.

PERCEPTUAL TRANSFORMATION: "In light of new information, a perceptual transformation sometimes occurs that changes what you thought you knew about someone, and the way you look at them forever."