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Key Words · Perception The process by which an organism selects and interprets sensory input so that it acquires meaning ·Abso| ute thresho|d The minimum amount of physical energy needed for an observer to perceive a stimulus is called an absolute threshold
Key Words • Perception The process by which an organism selects and interprets sensory input so that it acquires meaning. • Absolute threshold The minimum amount of physical energy needed for an observer to perceive a stimulus is called an absolute threshold