Four groups of 20 each (chronic brain-damaged schizophrenics, chronic non-brain-damaged schizophrenics, chronic non-brain-damaged with "acute" exacerbation, and control subjects) were individually administered Form I of the Luria Nebraska Neuropsychological Battery (LNNB). Control subjects scored significantly lower than all clinical groups on all scales except for the chronic non-brain-damaged schizophrenics on the Reading Scale. "Acute" schizophrenics scored higher on Motor, Visual, Receptive Speech, Intellectual Processes, Pathognomonic, Right Hemisphere and Profile Elevations scales than the other clinical groups. Chronic brain-damaged schizophrenics scored significantly higher than chronic non-brain-damaged schizophrenics on the Profile Elevation scale. To examine the possibility that LNNB performance of the schizophrenic groups may have been related to neuroleptic medication, analyses were completed on the relationship between medication levels and LNNB scores. These results suggested that while the three clinical groups differed in their chlorpromazine equivalents (CPZE), LNNB scores were not related to CPZE dosage.
This study examined the efficacy of the Schizophrenic‐Organicity (SC‐O), Psychiatric‐Organic (P‐O), the Pseudo‐Neurological (P‐N), and the Schizophrenia (SC) MMPI subscales in differentiating the following four groups of outpatients: brain‐damaged (n = 35, brain‐damaged schizophrenics (n = 10), non‐brain‐damaged schizophrenics (n = 15), and somatoform disorders (n = 45). Both unmatched and matched samples were used in the analysis, and cut‐off scores were obtained. In an unmatched sample, results suggested that the SC scale was useful in differentiating braindamaged schizophrenics from brain‐damaged and somatoform disorders. With matched samples, the SC differentiated brain‐damaged schizophrenics well from other clinical groups, while the P‐O scale differentiated the nonbrain‐damaged schizophrenics from brain‐damaged and somatoform disorders. Furthermore, the P‐N scale discriminated brain‐damaged schizophrenics from non‐brain‐damaged schizophrenics, while the SC‐O scale was no longer significant. Results suggest that caution should be used in generalizing from previous studies (which used inpatient samples) to outpatient populations.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.