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The size-weight illusion, emulation, and the cerebellum

Published online by Cambridge University Press:  01 June 2004

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
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Abstract:

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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
Copyright
Copyright © Cambridge University Press 2004