psyc_sept61 - September 6 2007 Sensation and Perception •...

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September 6, 2007 Sensation and Perception Sensation: the conversion of the stimulus to neural impulses; includes sight, hearing, touch, taste, and smell How do we take in information about the world? Perception: the selection, organization and interpretation of stimuli How do we make sense of the sensory information we take in? Perceptual constancy: we experience perceptual stability even though the sensed stimulus changes For example: size constancy- hand 6” vs. 18” from your eyes... it looks different in size, but your hand doesn't get larger or smaller in reality! Also, shape constancy- a football looks very different from different angles/perspectives but it maintains its shape consistantly. Experiencing a Stimulus Stimulus: anything that activates a sensory system 3-Step Process: 1. Stimulus energy (for example, a light photon) impacts sense receptors 2. Sense organ (in this case, the eye) interprets the stimulus energy into an electrical code 3.
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