Perception is the process by which individuals organize and interpret their sensory impressions to give meaning to their environment. It involves selecting stimuli, organizing that information, and interpreting it based on existing knowledge. Perception is influenced by factors in the perceiver like attitudes and expectations, factors in the target like size and motion, and situational factors like time and social setting. The perceptual process involves grouping stimuli into meaningful patterns through principles of figure-ground relationships, proximity, closure and similarity. When perceiving others, people make attributions about the causes of behaviors and use shortcuts like stereotyping, halo effects, and selective perception.