Two groups of schizophrenic patients received either bitemporal or right temporoparietal electroconvulsive therapy (ECT), both without anesthesia. Each patient received six treatments, the first three at 2-day intervals and the next three at 4-day intervals. Psychiatric evaluations and cognitive tests done at baseline, and 7 and 20 days after therapy, found similar degrees of improvement and similar effects on memory in both groups, with improvement in 40% and impairment in 30% of the patients. Subjective forgetfulness is more often experienced by the patients who receive bilateral ECT.