Right hemisphere language: Science or fiction?

Reviews inconsistencies and misrepresentations in M. S. Gazzaniga's (see record 1984-07149-001) analysis of 3 series of patients who underwent brain bisection. The inaccuracies led to the conclusion that right-hemisphere (RH) language and cognition are a rarity attributable to left-hemisphere brain damage. Gazzaniga's data fail to make a substantive contribution to the understanding of RH language or cognition.