Table 4.

RMSEA fit statistic for the multi-group models fit to test measurement invariance across the age groups

Step		MZ	DZ
0	Baseline	0.027	0.022
1a	Invariance of αi	0.027	0.021
1b	+ Invariance of rMzi and rDZi	0.026	0.020
1c	+ Invariance of τic	0.028	0.022
2a	No differences in θ	0.028	0.022
2b	No differences in COR(θ1,θ2)	0.024	0.019