Supplementary Figure 12: QQ plots of the χ2 test statistics for testing the null hypothesis that 2(rMZ – rDZ) = 0 and 2rDZ – rMZ = 0 and relationship with sample size.
From: Meta-analysis of the heritability of human traits based on fifty years of twin studies
(a) The deviation from the null hypotheses is quantified with the inflation λ in the QQ plots. (b) Effects as a function of sample size.
