Chapter

Spatial coordinates and phenomenology in the two visual systems model

Pierre Jacob and Frédérique de Vignemont

in Perception, Action, and Consciousness

Published in print August 2010 | ISBN: 9780199551118
Published online January 2011 | e-ISBN: 9780191594960 | DOI: http://dx.doi.org/10.1093/acprof:oso/9780199551118.003.0008
Spatial coordinates and phenomenology in the two visual systems model

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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

Chapter.  12907 words.  Illustrated.

Subjects: Cognitive Psychology

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