Bias in the estimation of heritability from truncated samples of twins
- Cite this article as:
- Martin, N.G. & Wilson, S.R. Behav Genet (1982) 12: 467. doi:10.1007/BF01065638
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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.