Abstract

This study was to investigate cognitive deficits of patients with schizophrenia. Twenty schizophrenics, twenty traumatic brain injury patients, and twenty normal control were performed the K-WAIS, Rey-Kim Memory Scale, and WCST. There were significant differences between premorbid intelligence and present intelligence in groups of schizophrenic patients. Schizophrenic group were lower score than normal control in verbal IQ, performance IQ, full scale IQ, but no significant differences between schizophrenic patients and traumatic brain injury patients. There were significant differences between schizophrenic patients and controls in cognitive flexibility, verbal comprehension, spatial organization, visual motor processing and attention, auditory processing and attention, auditory memory, and visual memory, but no significant differences between schizophrenic patients and traumatic brain injury patients in all variables. These results suggest that schizophrenics showed generalized cognitive impairment relative to controls and showed more severe cognitive deficit in auditory processing and attention, auditory memory, visual motor processing and attention, and verbal comprehension than other functions.