Life events and personality in late adolescence: Genetic and environmental relations |
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| Authors: | John P Billig Scott L Hershberger William G Iacono Matt McGue |
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| Institution: | (1) University of Minnesota, 55455 Minneapolis, Minnesota;(2) Department of Psychology, University of Kansas, 426 Fraser Hall, 66045-2160 Lawrence, Kansas |
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| Abstract: | The relationship between life events and personality was investigated in the Minnesota Twin/Family Study, using 216 monozygotic
and 114 dizygotic 17-year-old male twin pairs. Participants completed a life events interview designed for adolescents and
the Multidimensional Personality Questionnaire. Life events were categorized into three types: life events to which all members
of a family would be subject and those affecting an individual, which can be broadly construed as either nonindependent or
independent. Univariate genetic model fitting indicated the presence of significant genetic effects (h
2=49%) for nonindependent nonfamily life events but not for the other two types of life events. Bivariate genetic model fitting
further confirmed that the significant phenotypic correlation between nonindependent life events and personality is in part
genetically mediated. Specifically, the findings suggest that genetically influenced individual differences in constraint
play a substantial role in life events whose occurrence is not independent of the individual's behavior. |
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| Keywords: | Life events personality adolescence genetic multivariate analysis twin-family study |
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