Table 1 shows the correlations between T1 and M2, and the semi-partial correlations between \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$ {\text{T}}_{1}^{\prime } $$\end{document} and M2 for MZ and DZ twins in the three different scenarios (i.e., within-twin correlation between T and M runs either exclusively via A, exclusively via C, or exclusively via E).Table 1Correlations and semi-partial correlations between M2 and T1 if the within-twin correlation between T and M runs via A, via C, or via Erm2,t1 rm2(t1·m1) T and M correlated via A MZ.24.074 DZ.120T and M correlated via C MZ.24.074 DZ.24.124T and M correlated via E MZ0−.173 DZ0−.124 Note: rm2,t1 denotes the correlation between moderator of twin 2 (M2), and the trait of twin 1 (T1). rm2(t1·m1) denotes the semi-partial correlation between the moderator of twin 2 (M2) and the trait of twin 1 (T1) corrected for the moderator of twin 1 (M1). In these calculations, the variances of both T and M were 40%, 30%, and 30% due to A, C, and E, respectively
