Table 2.

Indices of Fit for Nested ACE Models Examining the Etiology of Thin-Ideal Internalization by Age and Pubertal Development.

Model	−2lnL	df	Δχ2 (df)	p	AIC	BIC
Age Models
Full Moderation	2854.44	1024	--	--	806.44	−1786.42
Linear Moderation	2855.83	1027	1.39 (3)	0.71	801.83	−1795.14
No Moderation	2857.06	1030	2.62 (6)	0.85	797.06	−1803.94
Puberty Models
Linear Moderation	2822.34	1011	--	--	800.34	−1754.98
No Moderation	2829.67	1014	7.33 (3)	0.06	801.67	−1760.71

Note. −2lnL = minus 2 times the log likelihood, Δχ2 = change in chi-square (−2lnL) from the full moderation model; AIC = Akaike information criteria, BIC = Bayesian information criterion; Mod = Moderator; DE = Disordered Eating; A=additive genetic effects; C = Shared environmental effects, E = Nonshared environmental effects. Best-fitting models, as determined from non-significant chi-square and lowest AIC and BIC values, are indicated with bold text. In the “Full” moderation model, genetic, shared environmental, and nonshared environmental estimates are allowed to vary both linearly and quadraticaly across levels of the moderator (i.e., age or pubertal development). In the “Linear” moderation model, genetic, shared environmental, and nonshared environmental estimates are allowed to vary linearly across levels of the moderator. In the “No Moderation” model, genetic, shared environmental, and nonshared environmental estimates are constrained to be equal across all age or pubertal groups. A full moderation model was not calculated for pubertal groups since quadratic moderation is not possible when examining only two groups.