Abstract
The performance of two choice reactions, one with each hand, in response to two visual discrimination tasks presented simultaneously, one in each half of the visual field, normally takes much longer than the performance of either one alone. In commissurotomized human patients, however, the double task was performed as rapidly as the single task. The results conform with the view that the neocortical commissures serve to unify adjustment to the visual world (Gazzaniga et al, 1965) and their presence tends to prevent the two half brains from making discordant volitional decisions.
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Aided by USPHS Grant MH 3372 and the Frank P. Hixon Fund of the California Institute of Technology.
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Gazzaniga, M.S., Sperry, R.W. Simultaneous double discrimination response following brain bisection. Psychon Sci 4, 261–262 (1966). https://doi.org/10.3758/BF03342286
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DOI: https://doi.org/10.3758/BF03342286