march 4 - Visual agnosia: deficits of visual object...

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Visual agnosia: deficits of visual object recognition. he could not recognize stuff by seeing it. He only recognized after he touched the object. Object -> (motion, color, form) -> edge grouping/surface extraction -> view normalization ->stored description. We recognize objects by abstracting features such as color, form, depth, Know this from cog neuro research—feature and conjunction searches Feature search: Evidence of independence of color and form—T search experiment. Treisman, et al….flat response against color, but when you do color and floor there is a slope. Feature binding is thought to require attention—assign features to objects. Also from neurophysiological dissociation ... like double dissociations. . find people that have 1 deficit, 1 person with other deficit, one person with 2 deficits, etc. Achromatopsia , cannot see color. Not due to color blindness, but rather due to brain damage in cortex.
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march 4 - Visual agnosia: deficits of visual object...

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