The functional cerebral organization of young men who were defined as illiterate was studied by testing their dichotic listening for language stimuli. These functionally illiterate men showed greater right ear advantage for language stimuli than 50 educated subjects, a pattern already observed with completely illiterate persons of both sexes. This finding is consistent with the view that mastering written codes for language might be one of the most relevant parameters in hemispheric specialization when language is studied.
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