PSY 102 Lecture Notes - Lecture 4: Tropicana Products, Subjective Constancy, Color Constancy
15 Aug 2016
School
Department
Course
Professor
Document Summary
Sensation: detection of physical energy (stimuli) by sense organs (eyes, ears, nose, skin, tongue) Sense organs relay info to the brain, simultaneously and changes, and brain has to adjust. Our perceptions don"t always match reality e. g. , filling in, reconstruction, interpolation. Sensation: bottom-up process by which our sensory organs receive and replay sensory input. Perception: top-down way our brains organize and interpret sensory input. Converts external stimuli into electrical signals with neurons. Done by sense receptors specific to certain stimuli (sight, smell, touch) Sensory adaptation: activism is greatest when a stimulus is first detected. Response diminishes over time to conserve energy (cognitive misers - we don"t need to response) Study of how we perceive sensory stimuli based on their physical characteristics. Absolute threshold: the lowest level of a stimulus that we can detect 50% of the time. Just noticeable difference: the smallest change in the intensity of a stimulus that we can detect.
