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18 Cards in this Set
- Front
- Back
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Sensation
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detect physical energy from the environment and encode it as neural signals
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Perception
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select, organize, and interpret our sensations
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Bottom-Up Processing
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begins with sensory receptors, detect lines/angles/colors of a form
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Top-Down Processing
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draw on experience and expectation to give an observation meaning
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Psychophysics
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study of relationships between physical characteristics of stimuli and our psycological experience of them
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Absolute Thresholds
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minimum stimuli needed to detect sensation 50% of the time
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Subliminal, Priming
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unconsciously sensed stimuli, suggestive powers
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Difference Threshold
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just noticeable difference, minimum difference b/w two stimuli that can be detected 50% of the time
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Weber's Law
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for the difference to be perceptible, must differ by a constant proportion
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Sensory Adaptation
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diminsihed sensitivity to unchanging stimulus
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Retina, Accommodation
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retina tissue on back of eye where image projected, lens adjusts by changing curvature alters picture to retina
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Rods and Cones
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rods = night, cones = colors
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Optic Nerve
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axons of ganglion cells leave in rope, create blind spot
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Fovea
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retina's area of central focus, acuity of vision
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Feature Detector
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neurons that receive info from individual ganglion cells in retina
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Parallel Processing
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doing many things at once (color, motion, form, depth)unlike step-by-step computer processing
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Young-Helmholtz Trichromatic Theory
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retina 3 types color recptor, red and green and blue (yellow!?)
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Opponent-Process Theory
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neurons turned on or off depending on color
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