Twin intraclass correlations (ICC) of grandiosity and entitlement.

Note. N = number of twin pairs with pairwised data. MZ = monozygotic twins; DZ = dizygotic twins; twin1 and twin2 are differentiated by the endings _1 and _2, respectively. 95% confidence intervals of ICC are in parentheses. The within-trait twin correlations are on the diagonal. The cross-trait twin correlations are above and below the diagonal.