This document discusses the concept of perception. It begins by defining perception as the process by which individuals select, organize, and interpret sensory stimuli to form a meaningful understanding of the world. It then explores various aspects of perception, including sensation and thresholds, as well as the three main elements of perception: selection, organization, and interpretation. Selection involves what stimuli grab our attention based on expectations and motives. Organization discusses how we group related stimuli together. Interpretation examines how we attribute meaning to stimuli, which can be influenced by stereotypes, physical appearances, and first impressions. The document also covers related topics like risk perception and ways to reduce perceived risk when making purchases.