PSC 100 Chapter Notes - Chapter 4: Agnosia, Simple Features, Tachistoscope
Document Summary
Apperceptive agnosia: can see object"s shape, color, and position, but can"t put these elements together to perceive the intact object. Ex: task = copying drawings, result = inability to assemble various elements that. Associative agnosia: can see, but can"t link what they se to their basic visual knowledge she sees. Ex: fails to put on shoe because you don"t recognize it as a shoe. Top - down processes ( concept - driven ): processes shaped by knowledge. Bottom - up processes ( data driven ) - processes that are directly shaped by the. Many objects are recognized by virtue of their parts (ex: trunk of elephant) stimulus. Perhaps you recognize the parts by looking at their parts. Ex: the (roughly) parallel lines that identify the elephant"s trunk. Recognition may begin with the identification of visual features in the input pattern. People are efficient when searching for a target defined by a simple features.
