The document discusses consumer perception and the perception process. It describes perception as how individuals select, organize, and interpret stimuli to form a meaningful understanding of the world. The perception process involves sensation, where the senses directly respond to stimuli, and perception, where sensations are selected, organized, and interpreted. It outlines several dynamics of perception, including the absolute threshold which is the lowest level at which a sensation can be detected, and the differential threshold which is the minimum difference between two stimuli needed to detect a change. It also discusses subliminal perception of weak stimuli and selective perception in how people selectively pay attention to messages.