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One visual system with two interacting visual streams

Published online by Cambridge University Press:  23 January 2003

Jason S. McCarley
Affiliation:
Beckman Institute, University of Illinois at Urbana, Champaign, IL 61801 [email protected]
Gregory J. DiGirolamo
Affiliation:
Department of Experimental Psychology, University of Cambridge, Cambridge, CB2 3EB [email protected]

Abstract

Norman's aim to reconcile two longstanding and seemingly opposed philosophies of perception, the constructivist and the ecological, by casting them as approaches to complementary subsystems within the visual brain is laudable. Unfortunately, Norman overreaches in attempting to equate direct perception with dorsal/unconscious visual processing and indirect perception with ventral/conscious visual processing. Even a cursory review suggests that the functional and neural segregation of direct and indirect perception is not as clear as the target article would suggest.

Type
Brief Report
Copyright
© 2002 Cambridge University Press

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