Abstract
The effect of early visual deprivation on cerebral lateralization for speech production was investigated using the dual‐task paradigm (tapping with concurrent vocalization). Some 28 right‐handed subjects (14 congenitally blind and 14 normal‐sighted adolescents matched on the basis of sex and age) participated in this study. Results reveal significant suppressions from baseline tapping rates under concurrent vocalization with the right but not the left hand for both groups. These findings suggest that congenital blindness per se does not alter the normal pattern of left hemispheric dominance for speech. The role of adequate early linguistic environmental experience on language lateralization is discussed.
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