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Perception, Action, and ConsciousnessSensorimotor Dynamics and Two Visual Systems$
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Nivedita Gangopadhyay, Michael Madary, and Finn Spicer

Print publication date: 2010

Print ISBN-13: 9780199551118

Published to Oxford Scholarship Online: January 2011

DOI: 10.1093/acprof:oso/9780199551118.001.0001

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Spatial coordinates and phenomenology in the two visual systems model

Spatial coordinates and phenomenology in the two visual systems model

Chapter:
(p.125) Chapter 8 Spatial coordinates and phenomenology in the two visual systems model
Source:
Perception, Action, and Consciousness
Author(s):

Pierre Jacob

Frédérique de Vignemont

Publisher:
Oxford University Press
DOI:10.1093/acprof:oso/9780199551118.003.0008

The ‘two-visual’ systems hypothesis has recently come under attack regarding its proposed functional dichotomy between vision-for-action and vision-for-perception as well as for the limited interaction it allows between visual awareness and processing in the dorsal stream. Schenk (2006) questions the rigid functional dichotomy between vision-for-perception and vision-for-action, arguing that the dual model of vision is best accounted for in terms of a dissociation between egocentric and allocentric spatial coordinate systems. Wallhagen (2007) argues that there is no evidence to claim that the processing in the dorsal stream cannot underlie visual awareness. This chapter offers a response to both challenges and disentangles the contribution of two separable factors to the two-visual systems model, namely, how spatial information is coded and the relation between consciousness and processing in the ventral and dorsal streams respectively.

Keywords:   two-visual systems model, Schenk, Wallhagen, vision, visual processing, dorsal stream, ventral stream, spatial information

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