The document discusses perception and how it affects how people view the same situation differently. It defines perception as the process of selecting, organizing, and interpreting sensory information and environmental stimuli. Perception is subjective and can differ from objective reality. It is influenced by both external factors related to the stimuli itself, like its nature, location, size, and intensity, as well as internal factors related to the individual perceiver, such as their self-concept, needs, attitudes, interests, and experiences. The perceptual process involves selecting stimuli as input, organizing and interpreting it through the perceptual mechanisms, and forming perceptual outputs like attitudes, opinions, and behaviors.