PSY_200_Test_1_Guide_5 - 400 nm to 700 nm Trichromatic...

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Sensation and Perception Sensation: The process that detects stimuli from our body or surroundings Perception: the process that organizes sensations into meaningful patterns. Absolute Sensory Threshold: Intensity at which a given individual can detect a sensory stimulus 50% of the time. Signal Detection Theory: Study of people’s tendencies to make 1. hits 2. correct rejections 3. misses 4. false alarms Sensory Adaptation: is a change over time in the responsiveness of the sensory system to a constant stimulus. What Happens When You Vary a Lightwave’s: Wavelength: Hue Height of Wave: Brightness Mix of Lightwaves: Saturation or purity Rods: Are adapted for vision in dim light. Cones: Are adapted for color vision, daytime vision, and detailed vision. Visible Light:
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Unformatted text preview: 400 nm to 700 nm Trichromatic Theory of Color Vision: Color vision depends on the relative rate of response by three types of cones. (blue, green and red). Opponent-Process Theory: We perceive color in terms of a system of paired opposites. (red vs. green)(yellow vs. blue)(black vs. white) Afterimages: When you look at one color to long you see the opposite when you look away. Retinex Theory: We perceive color through the cerebral cortex’s comparison of various retinal patterns. A Gestalt Psychologist would say “The whole is greater than the sum of it’s parts”. Top Down Processing: Information processing based on previous knowledge. Bottom Up Processing: Information processing without previous knowledge....
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