中華心理學刊 民 82，35 卷，1 期，59-65
Chinese Journal of Psychology 1993, Vol.35, No.1, 59-65

PETER H. SCHÖNEMANN（National Taiwan University Taipei, Taiwan, R.O.C）

Abstract

It is shown that the still widely used heritability estimate h2 developed by Holzinger (1937) is not valid because Holzinger's derivation of it was unsound: The variance component mode l he used to derive h2, together with his claim that it estimates the genetic variance ratio, imply the counterfactual assertion that dizygotic twins share no genes. While a competing coefficient, Nichols' HR, does indeed follow from the conventional variance component model, the necessary conditions it rests on lack empirical face validity.