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The size-weight illusion, emulation, and the cerebellum

Published online by Cambridge University Press:  01 June 2004

Edward M. Hubbard  and
Vilayanur S. Ramachandran
Edward M. Hubbard*
Affiliation:
Department of Psychology, Center for Brain and Cognition, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA92093-0109http://psy.ucsd.edu/~edhubbardhttp://psy.ucsd.edu/chip/ramabio.html
Vilayanur S. Ramachandran*
Affiliation:
Department of Psychology, Center for Brain and Cognition, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA92093-0109http://psy.ucsd.edu/~edhubbardhttp://psy.ucsd.edu/chip/ramabio.html
*
edhubbard@psy.ucsd.edu
vramacha@ucsd.edu
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Abstract:

In this commentary we discuss a predictive sensorimotor illusion, the size-weight illusion, in which the smaller of two objects of equal weight is perceived as heavier. We suggest that Grush's emulation theory can explain this illusion as a mismatch between predicted and actual sensorimotor feedback, and present preliminary data suggesting that the cerebellum may be critical for implementing the emulator.

Type
Open Peer Commentary
Information
Behavioral and Brain Sciences , Volume 27 , Issue 3 , June 2004 , pp. 407 - 408
Copyright
Copyright © Cambridge University Press 2004

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