psy432 - January 30, 2008 Perception How the brain sees...

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January 30, 2008 Perception How the brain sees What happens to information in the brain? “Bottom-up” approach: sensory information is comprised of simple features, o Feature detection approach “Top-down” approach: sensory information is interpreted in context, as o Gestalt approach The Evidence for Feature Detection o Specialized neurons that respond best to particular features (Hubel & Wiesel, 1968) o o Area of middle temporal lobe necessary fro perception of movement o Motion blindness http://www.hhmi.org/senses/b210.htm o Effects of fatiguing your feature detectors o Fixate on the red square… Gestalt Principles of Grouping Similarity o Objects that have similar characteristics are grouped together Proximity o Objects that are close together are perceived as belonging together Continuity
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psy432 - January 30, 2008 Perception How the brain sees...

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