cheatsheet - SENSATION AND PERCEPTION Overview definition...

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** SENSATION AND PERCEPTION Overview, definition: Sensation = conversion of physical energy into patterns of brain activity; Perception = organization and interpretation of sensation ~~ The senses and the sense organs : Transduction - the action or process of converting something and especially energy or a message into another form ~~ Psychophysics way to study relation between physical events (energy) and sensory events (experience) a. absolute threshold : minimum amount of energy needed to give rise to some sensation b. difference threshold : 2 stimuli, minimum difference in energy to give rise to difference in sensation - jnd i. Weber’s law – jnd = kM, k a constant fraction, M the stimulus magnitude c. Subliminal perception: event that can’t be consciously reported affects behavior ~~ Functioning of the eye and cells in the thalamus and visual cortex a. Photoreceptors i. Rods and cones. Blind spot ii. sent to thalamus (lateral geniculate nucleus, LGN, then primary visual cortex, and beyond). b. Higher levels of visual sensation: Sensory analysis of form i. Primary visual cortex. Maps. Specialized detectors. ii. Higher levels of visual cortex. (1) “What” and “where” systems iii. Effects of brain damage c. Color vision i. spectral colors (1) subtractive mixture: mixture of pigments (2) Additive mixture: mixture of lights . ii. cones sensitive to hue, mostly in center of retina (fovea), colorblind near edge
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cheatsheet - SENSATION AND PERCEPTION Overview definition...

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