Table 3. Parameter estimates (unstandardized) from main effects model and interaction model for total, verbal, and nonverbal cognitive abilities.

	Total score				Verbal				Nonverbal
	Main effects		Interaction		Main effects		Interaction		Main effects		Interaction
Parameter	Estimate	SE	Estimate	SE	Estimate	SE	Estimate	SE	Estimate	SE	Estimate	SE
a	0.538	0.059	0.532	0.061	0.476	0.074	0.473	0.077	0.606	0.072	0.594	0.074
βx			-0.017	0.071			-0.126	0.078			-0.006	0.076
c	0.684	0.050	0.683	0.051	0.699	0.052	0.697	0.051	0.575	0.068	0.579	0.069
βy			-0.079	0.056			-0.028	0.046			-0.090	0.071
e	0.436	0.022	0.437	0.023	0.486	0.024	0.479	0.023	0.518	0.027	0.521	0.027
βz			0.017	0.025			0.049	0.021			0.012	0.029
βM	0.201	0.039	0.193	0.038	0.194	0.039	0.186	0.038	0.161	0.038	0.153	0.038

Parameters in bold are significant at p < .05; Parameters in italics are significant at p < .10; SE = standard error; a, c, e, = unmoderated elements of genetic, shared, and nonshared path coefficients; a´, c´, e´, = moderated elements of genetic, shared, and nonshared path coefficients.