Table 2.

Fit statistics for biometric moderation models

	−2lnL	df	X2	p	AIC
PEM
Full ACE Moderation	6151.57	2256			1639.57
No Moderation	6162.38	2262	10.81	0.09	1638.38
Well-Being
Full ACE Moderation	6122.29	2266			1590.29
No Moderation	6153.70	2272	31.41	0.00	1609.70
Social Potency
Full ACE Moderation	6245.03	2265			1715.03
No Moderation	6266.45	2271	21.42	0.00	1724.45
Achievement
Full ACE Moderation	6260.93	2265			1730.93
No Moderation	6265.09	2271	4.16	0.65	1723.09
Social Closeness
Full ACE Moderation	6286.35	2266			1754.35
No Moderation	6290.94	2272	4.59	0.60	1746.94
NEM
Full ACE Moderation	6131.80	2256			1619.80
No Moderation	6145.04	2262	13.24	0.04	1621.04
Stress Reaction
Full ACE Moderation	6208.84	2266			1676.84
No Moderation	6215.19	2272	6.35	0.38	1671.19
Alienation
Full ACE Moderation	6174.70	2266			1642.70
No Moderation	6192.36	2272	17.66	0.01	1648.36
Aggression
Full ACE Moderation	6156.57	2265			1626.57
No Moderation	6181.79	2271	25.23	0.00	1639.79
CN
Full ACE Moderation	6253.25	2256			1741.25
No Moderation	6268.70	2262	15.45	0.02	1744.70
Control
Full ACE Moderation	6353.39	2265			1823.39
No Moderation	6358.62	2271	5.23	0.51	1816.62
Harm Avoidance
Full ACE Moderation	6242.56	2265			1712.56
No Moderation	6244.05	2271	1.48	0.96	1702.05
Traditionalism
Full ACE Moderation	6140.65	2258			1624.65
No Moderation	6155.68	2264	15.03	0.02	1627.68
Absorption
Full ACE Moderation	6258.57	2265			1728.57
No Moderation	6272.08	2271	13.52	0.04	1730.08

Note. N=572 twin pairs. −2lnL=−2 log likelihood; df=degrees of freedom; X²=difference in −2 log likelihood between full moderation and no moderation models; the difference in df between full moderation and no moderation models is 6 for all personality traits; p=probability value; AIC=Akaike Information Criterion, with smaller values indicating better model fit (shown in bold).