Table 4.

Fit indices for all HC models

Index	Good fita	Correlational model	Direct age effects	Dual indirect paths	Single indirect path A*	Single indirect path B	Reverse indirect effects
Nested models
d.f.		23.00	28.00	29.00	27.00	29.00	29.00
χ2		21.33	29.79	31.79	24.97	71.79	71.98
χ2 P-value	>0.05	0.26	0.07	0.03	0.16	<0.0001	<0.0001
χ2/d.f.	<2	1.19	1.49	1.67	1.31	3.42	3.43
CFI	≥0.90	0.99	0.98	0.97	0.99	0.89	0.89
TLI	≥0.90	0.99	0.96	0.95	0.98	0.82	0.82
Non-nested models
AIC	low value	300.25	300.71	308.71	301.89	344.71	344.9
BIC	low value	398.44	387.99	404.17	397.35	434.71	434.9
RMSEA	≤0.05	0.04	0.07	0.08	0.05	0.15	0.15
SRMR	≤0.05	0.06	0.08	0.07	0.07	0.13	0.22

*Model includes correlation between the left and right measures for HC T2* and HC volume constructs.

^aRaykov and Marcoulides (2006).