Loss of Discriminative “Power” of the MMPI with Older Psychiatric Patients

Abstract
MMPIs were obtained from four groups of 20 hospitalized male patients which differed in age (18–28 years vs 45–59 years) and psychiatric diagnosis (schizophrenic vs nonschizophrenic). The MMPI discriminated between young schizophrenic and nonschizophrenic patients but did not discriminate between older schizophrenic and nonschizophrenic patients. The apparent loss of discriminative “power” of the MMPI with older patients was interpreted as supporting the importance of the often overlooked nonpathological characteristics of the psychological test subject.

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