Canonical Analysis of the MMPI and WAIS in a Psychiatric Sample

Abstract

Valid MMPI and WAIS subscale raw scores, collected from 197 psychiatric inpatients, were subjected to bivariate, multiple, and canonical correlational analyses. 25% of the bivariate correlations and 50% of the multiple correlations were significant. A canonical R of .609 obtained between the WAIS subtests and the MMPI clinical scales, and a canonical R of .394 between the WAIS subtests and the MMPI validity scales. While bivariate relationships between pairs of specific MMPI and WAIS subscales are small, a not inconsequential amount of overlapping variance between the two is observed using multivariate techniques. The relationship between the MMPI clinical scales and the MMPI subtests is accounted for by a cognitive factor. General intellectual ability is hypothesized to account for the relationship between the MMPI validity scales and the WAIS subtests.

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References

Bloom

R. B.

Entin

A. D.

Intellectual functioning and psychopathology: A canonical analysis of WAIS and MMPI relationships. Journal of Clinical Psychology, 1975, 31, 697–698.

Frank

G. H.

The measurement of personality from the Wechsler tests. In Maher

B. A.

(Ed.), Progress in experimental personality research. Vol. 5. New York: Academic Press, 1970. Pp. 168–184.

Gaines

Jr. Morris

Relationships between MMPI measures of psychopathy and WAIS subtest scores and intelligence quotients. Perceptual and Motor Skills, 1978, 47, 399–402.

Holland

T. R.

Watson

C. G.

Multivariate analysis of WAIS-MMPI relationships among brain-damaged, schizophrenic, neurotic, and alcoholic patients. Journal of Clinical Psychology, 1980, 36, 352–359.

L'Abate

P. B.

The relationship between WAIS-derived indices of maladjustment and MMPI in deviant groups. Journal of Consulting Psychology, 1968, 26, 441–445.

Lacks

P. B.

Keefe

Relationships among education, the MMPI and WAIS measures of psychopathology. Journal of Clinical Psychology, 1970, 26, 468–470.

Matarazzo

J. D.

Wechsler's ‘Measurement and appraisal of adult intelligence.’ (5th ed.) Baltimore, MD: Williams & Wilkins, 1972.

Turner

R. G.

Horn

J. M.

MMPI item correlates of WAIS subtest performance. Journal of Clinical Psychology, 1976, 32, 583–594.

Watson

C. G.

Davis

W. E.

McDermott

M. T.

MMPI-WAIS relationships in organic and schizophrenic patients. Journal of Clinical Psychology, 1976, 32, 539–540.

10.

Wechsler

The measurement and appraisal of adult intelligence. (4th ed.) Baltimore, MD: Williams & Wilkins, 1958.