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Personality and divorce: a genetic analysis

V Jocklin1, M McGue, D T Lykken

  • 1Department of Psychology, University of Minnesota, Minneapolis 55455, USA. jockin@maroon.tc.umn.edu

Journal of Personality and Social Psychology
|August 1, 1996
PubMed
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Genetic factors significantly influence divorce risk by affecting personality traits. Specific personality dimensions like Positive Emotionality and Negative Emotionality increase divorce risk, while Constraint decreases it.

Area of Science:

  • Behavioral Genetics
  • Psychology
  • Sociology

Background:

  • Divorce risk is influenced by genetic, social, and psychological factors.
  • Previous research established a substantial genetic mediation of divorce risk.
  • Personality traits are known psychological factors impacting divorce risk.

Purpose of the Study:

  • To investigate the extent to which genetic influences on personality explain the heritability of divorce risk.
  • To link genetic predispositions with psychological factors and divorce outcomes.

Main Methods:

  • Utilized data from adult twins registered in the Minnesota Twin Registry.
  • Administered a marital history questionnaire and the Multidimensional Personality Questionnaire.
  • Analyzed genetic correlations between personality traits and divorce risk.

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Main Results:

  • Positive Emotionality and Negative Emotionality personality factors were positively associated with divorce risk.
  • The Constraint personality factor was negatively associated with divorce risk.
  • Genetic factors influencing personality accounted for 30% (women) and 42% (men) of divorce risk heritability.

Conclusions:

  • Genetic influences on personality traits play a significant role in the heritability of divorce risk.
  • Common genetic factors underlie the correlation between personality and divorce risk.
  • Understanding personality heritability can elucidate genetic contributions to marital stability.