Behavior Genetics

, Volume 10, Issue 2, pp 153–162 | Cite as

Assessment of heritability for personality, based on a short-form of the Eysenck personality inventory: A study of 12,898 twin pairs

  • Birgitta Floderus-Myrhed
  • Nancy Pedersen
  • Ingrid Rasmuson


The influence of genetic factors for two personality dimensions was analyzed using data from 12,898 unselected twin pairs of the Swedish Twin Registry. The heritability index was 0.50 (men) and 0.58 (women) for psychosocial instability. Corresponding figures for psychosocial extraversion were 0.54 and 0.66. Thus, about half the phenotypic variation may be attributed to genetic factors.

Key Words

twin studies heritability extraversion neuroticism 


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  1. Cederlöf, R., and Lorich, U. (1978). The Swedish Twin Registry. InTwin Research: Biology and Epidemiology, Alan R. Liss, Inc., New York, pp. 189–195.Google Scholar
  2. Cederlöf, R., Friberg, L., Jonsson, E., and Kaij, L. (1961). Studies on similarity diagnosis in twins with the aid of mailed questionnaires.Acta Genet. Med. Gemellol. 11:338–362.Google Scholar
  3. Cederlöf, R., Friberg, L., and Lundman, T. (1977). The interactions of smoking, environment and heredity, and their implications for disease etiology: A report of epidemiological studies on the Swedish Twin Registries.Acta Med. Scand., Suppl. No. 612.Google Scholar
  4. Eaves, L. J. (1973). The structure of genotypic and environmental covariation for personality measurements: An analysis of the PEN.Br. J. Soc. Clin. Psychol. 12:275–282.Google Scholar
  5. Eaves, L. J., and Eysenck, H. J. (1974). Genetics and the development of social attitudes.Nature 249:288–289.Google Scholar
  6. Eaves, L. J., and Eysenck, H. J. (1975). The nature of extraversion: A genetical analysis.J. Personal. Soc. Psychol. 32:102–112.Google Scholar
  7. Eaves, L., and Eysenck, H. (1976). Genetic and environmental components of inconsistency and unrepeatability in twins' responses to a neuroticism questionnaire.Behav. Genet. 6:145–160.Google Scholar
  8. Eysenck, H. J. (1956). The inheritance of extraversion-introversion.Acta Psychol. 12:95–110.Google Scholar
  9. Eysenck, H. J., and Prell, D. (1951). The inheritance of neuroticism: An experimental study.J. Ment. Sci. 97:441–465.Google Scholar
  10. Falconer, D. S. (1960).Introduction to Quantitative Genetics, Ronald Press, New York.Google Scholar
  11. Floderus, B. (1974). Psycho-social factors in relation to coronary heart disease and associated risk factors.Nord. Hyg. Tidskr., Suppl. No. 6.Google Scholar
  12. Gottesman, I. I. (1966). Genetic variance in adaptive personality traits.J. Child Psychol. Psychiat. 7:199–208.Google Scholar
  13. Loehlin, J. C. (1976). Psychological genetics, from the study of human behavior. In Cattell, R. B., and Dreger, R. M. (eds.),Handbook of Modern Personality Theory, Aldine, New York, pp. 329–347.Google Scholar
  14. Loehlin, J. C., and Nichols, R. C. (1976).Heredity, Environment, and Personality, University of Texas Press, Austin, Tex.Google Scholar
  15. Lundman, T. (1966). Smoking in relation to coronary heart disease and lung function in twins: A co-twin control study.Acta Med. Scand., Suppl. No. 455.Google Scholar
  16. McClearn, G. E., and De Fries, J. C. (1973).Introduction to Behavioral Genetics, Freeman, San Francisco.Google Scholar
  17. Medlund, P., Cederlöf, R., Floderus-Myrhed, B., Friberg, L., and Sörensen, S. (1976). A new Swedish twin registry.Acta Med. Scand., Suppl. No. 600.Google Scholar
  18. Myrhed, M. (1974). Alcohol consumption in relation to factors associated with ischemic heart disease: A co-twin control study.Acta Med. Scand., Suppl. No. 567.Google Scholar
  19. Plomin, R., Willerman, L., and Loehlin, J. C. (1976). Resemblance in appearance and the equal environments assumption in twin studies of personality traits.Behav. Genet. 6:43–52.Google Scholar
  20. Sarna, S. (1977).Zygosity Diagnosis in Epidemiological Twin Studies: By Blood Markers and by Questionnaire, University of Helsinki Press, 23, Helsinki.Google Scholar
  21. Shields, J. (1962).Monozygotic Twins Brought up Apart and Brought up Together, Oxford University Press, London.Google Scholar
  22. Vandenberg, S. G. (1976). Twin studies In Kaplan, A. R. (ed.),Human Behavior Genetics, Thomas, Springfield, Ill., pp. 90–146.Google Scholar

Copyright information

© Plenum Publishing Corporation 1980

Authors and Affiliations

  • Birgitta Floderus-Myrhed
    • 1
    • 2
  • Nancy Pedersen
    • 3
  • Ingrid Rasmuson
    • 1
    • 2
  1. 1.The Department of Environmental Hygiene of the Karolinska InstituteStockholmSweden
  2. 2.The Department of Environmental Hygiene of the National Swedish Environment Protection BoardStockholmSweden
  3. 3.Institute for Behavioral GeneticsUniversity of ColoradoBoulder

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