Heritability of MMPI personality indicators of psychopathology in twins reared apart.

David L. DiLalla · Gregory Carey · Irving I. Gottesman · Jr. Bouchard Thomas J.

76 citations0/0 files storedJournal of Abnormal Psychology

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Personality Traits and Psychology Genetic Associations and Epidemiology Cognitive Abilities and Testing

Abstract

This report presents Minnesota Multiphasic Personality Inventory (MMPI) findings from the Minnesota Study of Twins Reared Apart. Data from 65 unique pairs of monozygotic twins reared apart (MZA) and 54 unique pairs of dizygotic twins reared apart (DZA) were analyzed. As in other results from this sample, MZA twins evidenced substantial similarity, highlighting the influence of shared genes. Biometric modeling yielded estimates of heritability for the MMPI's standard validity and clinical scales and for the Wiggins content scales ranging from .26 to .62 (M = .44), echoing previous findings from the twin and adoption literature on personality. The pattern of MZA and DZA correlations suggested nonadditive genetic effects for 3 MMPI scales. Multivariate profile analyses also suggested genetic influence on both profile elevation and shape.

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References

2013Diagnostic and Statistical Manual of Mental Disorders 1987A Systematic Method for Clinical Description and Classification of Personality Variants 1994Temperament, personality, and the mood and anxiety disorders.1990Personality Disorders and The Five-Factor Model of Personality 1988Personality similarity in twins reared apart and together.1992Genes and environment in personality development 1993Personality stability and change in early adulthood: A behavioral genetic analysis.1994Testing a model for the genetic structure of personality: A comparison of the personality systems of Cloninger and Eysenck.

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