Behavior Genetics

, Volume 12, Issue 4, pp 467–472

Bias in the estimation of heritability from truncated samples of twins

  • N. G. Martin
  • S. R. Wilson
Short Communication


Sampling twins from a truncated distribution and ignoring this truncation in the estimation procedure lowers correlation coefficients and can considerably bias estimates of the proportions of genetic and environmental variance. A greater proportion of DZ than MZ twins will be missed in sampling for any heritable trait. The implications for two published sets of educational achievement data are considered.

Key Words

bias heritability truncation twins educational achievement 


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Copyright information

© Plenum Publishing Corporation 1982

Authors and Affiliations

  • N. G. Martin
    • 1
  • S. R. Wilson
    • 2
  1. 1.Department of Population Biology, Research School of Biological SciencesAustralian National UniversityCanberraAustralia
  2. 2.Department of Statistics, Research School of Social SciencesAustralian National UniversityCanberraAustralia

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