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Functional size invariance is not provided by the cortical magnification factor.

E. L. Schwartz (see record 1981-25194-001) proposed that the log polar or "complex log" mapping of the striate cortex that gives rise to the cortical magnification factor also serves to provide size invariance in vision. The present author shows that the cortical magnification factor cannot support functional size invariance. The essential flaw in Schwartz's proposal is the lack of position invariance in the striate representation. (15 ref) (PsycINFO Database Record (c) 2007 APA, all rights reserved)



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