Table 2.

Model fitting procedure for submodels.

#	Description of Nested Model	Comparison	−2LL	Δdf	Δ Χ2	p-value	ΔAIC	ΔBIC
10	Set C common factor loadings on SELF to be equal over time	vs. model 7*	36647.45	3	72.86	0	66.86	52.021
11	Set C common factor loadings on PEER to be equal over time	vs. model 7	36594.26	3	19.67	0	13.67	−1.175
12	Set A common factor loadings on SELF to be equal over time	vs. model 7	36665.49	3	90.91	0	84.91	70.061
13	Set A common factor loadings on PEER to be equal over time	vs. model 7	36609.58	3	34.99	0	28.99	14.151
14	Within E, drop causation from SELF to PEER	vs. model 7	36588.8	4	14.21	0.01	6.21	−13.582
15	Within E, constrain causation from SELF to PEER to be equal across waves	vs. model 7	36575.62	3	1.03	0.79	−4.97	−19.814
16	Within E, drop causation from PEER to SELF	vs. model 15	36608.27	4	32.65	0	26.65	4.860
17	Within E, constrain causation from PEER to SELF to be equal across waves	vs. model 15	36582.11	3	6.49	0.09	0.49	−14.35
18	Within E, equate forward transmission within SELF	vs. model 15	36625.65	2	50.04	0	46.04	36.140
19	Within E, equate forward transmission within PEER	vs. model 15	36588.26	2	12.65	0	8.65	−1.250
20	Set rC to 1	vs. model 15	36575.46	1	−0.15	1	−2.15	−7.101
21	Set rG to 1	vs. model 20	36592.52	1	17.05	0	15.05	10.104

^*Model 7 refers to Model 7 in Table 1.

Abbreviations as in Table 1, plus the following: Δdf=change in degrees of freedom between the nested model and its comparison model; ΔΧ²=chi-square statistic, based on change in −2LL; ΔAIC/ΔBIC =change in AIC/BIC value between the nested model and its comparison model.

Italic text indicates that the nested model was selected, and subsequent models were fit within the context of that model.