The "equal environments assumption" in MZ-DZ twin comparisons: an untenable premise of psychiatric genetics?

  title={The "equal environments assumption" in MZ-DZ twin comparisons: an untenable premise of psychiatric genetics?},
  author={A. Pam and S. Kemker and C. Ross and R. Golden},
  journal={Acta geneticae medicae et gemellologiae},
  volume={45 3},
  • A. Pam, S. Kemker, +1 author R. Golden
  • Published 1996
  • Psychology, Medicine
  • Acta geneticae medicae et gemellologiae
  • The comparison of MZ-DZ twins in behavioral genetics has produced what seems like irrefutable evidence for the heritability of many psychiatric disorders. But such research depends on the validity of the EEA--the "equal environments assumption"--as an underlying premise. In this paper, several empirical studies which support the EEA are critically reviewed in terms of methodology and the way data has been processed in a mathematical model called "path analysis". It turns out that studies… CONTINUE READING

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