Table III.

Fit statistics when ACE estimated separately and constrained equal in twin and adoption samples.

Phenotype	−2LL	DF	AIC	Δχ2 (2)	p
AC
Free	28484.80	4041	20402.80	.06	.97
Constrained	28484.86	4043	20398.86
SC
Free	28550.59	4057	20436.59	1.73	.42
Constrained	28552.32	4059	20434.32
SP
Free	28377.06	4048	20281.06	.27	.83
Constrained	28377.33	4050	20277.33
WB
Free	30190.67	4359	21472.67	.60	.74
Constrained	30191.27	4361	21469.27
AG
Free	31432.32	4367	22698.32	2.58	.28
Constrained	31434.91	4369	22696.91
AL
Free	31086.41	4368	22350.41	1.82	.40
Constrained	31088.23	4370	22348.23
SR
Free	31561.67	4367	22827.67	1.31	.52
Constrained	31562.98	4369	22824.98
CN
Free	30285.48	4362	21561.48	10.73	.005
Constrained	30296.21	4364	21568.21
HA
Free	32259.60	4365	23529.60	4.99	.08
Constrained	32264.59	4367	23530.59
TR
Free	26662.61	4015	18632.61	1.89	.39
Constrained	26664.50	4017	18630.50
AB
Free	29304.75	4044	21216.75	4.25	.12
Constrained	29309.00	4046	21217.00
PEM
Free	31767.76	3989	23789.76	.78	.68
Constrained	31768.53	3991	23786.53
NEM
Free	32287.41	3989	24309.41	1.28	.53
Constrained	32288.69	3991	24306.69
CON
Free	33170.41	3989	25192.41	4.22	.12
Constrained	33174.63	3991	25192.63
Average
Free	307182.75	44613	217956.75	4.79	.09
Constrained	307187.54	44615	217957.54

Note. −2LL = −2 log likelihood, DF = degrees of freedom, AIC = Akaike Information Criterion, Free = a model where variance components are estimated separately for the twin sample and adoption sample, Constrained = a model where variance component estimates are constrained to be equal across samples, AC = Achievement, SC = Social Closeness, SP = Social Potency, WB = Well Being, AG= Aggression, AL = Alienation, SR = Stress Reaction, CN = Control, HA= Harm Avoidance, TR = Traditionalism, AB = Absorption, PEM = Positive Emotionality, NEM = Negative Emotionality, CON = Constraint.