An examination of differences between native and non-native psychiatric offenders on the MMPI.

Abstract

ABSTRACT MMPI scores of 57 native and 218 non-native Canadian Prairie psychiatric offenders were compared.In uncontrolled comparisons, considerable cross-cultural profile similarity was observed. Neverthe-less, natives displayed significantly higher scores on L, F, and Hs (p < .05), and tended towardssignificance on Sc (p < .08). Natives scored significantly lower on Mf. Next, separate native andnon-native multiple regressions were performed, using the 13 MMPI scales as criterion variableswith age, time served, education level, WAIS full scale IQ, and Verbal Comprehension as the predictors.Average /P's of .26 (ns) and .17 (p < .001) were observed for natives and non-natives, respective-ly. WAIS full scale IQ and education level were the strongest predictors of native and non-nativeMMPIs, respectively. When controlled MMPI comparisons were made using IQ and education ascovariates, the previous differences were erased. Profile similarity was still evident. With covari-ates, significantly lower native scores were found on Mf, Pa, and Si, while K was significantly higher.The lowered native profile was due primarily to the IQ covariate. It was concluded that the MMPIwas valid for use with native offenders where consideration is given to the secondary effects of IQand the limited influence of culture.

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