TABLE 2.

Confirmatory factor multigroup analysis for the 52-, 25-, and 10-item version of the SPSI-R.

	Items	Factors	χ 2	df	p	RMSEA	WRMR	CFI	ΔCFI
CFA Model Fit Across Measure Versions	52	5	7655.75	1.264	0.00	0.06	2.55	0.91
	25	5	2162.72	265	0.00	0.07	2.18	0.93
	10	1	1542.66	35	0.00	0.18	3.70	0.73
Measurement Invariance
SPSI-R 52 items
Time point (T1 vs. T2)
Configural Invariance*			11506.59	2.528	<0.001	0.06	3.14	0.92	na
Metric Invariance**			11342.52	2.575	<0.001	0.06	3.14	0.92	0.001
Scalar Invariance***			11413.85	2.726	<0.001	0.06	3.18	0.93	0.001
Language (English vs. Spanish)
Configural Invariance			7617.91	2.528	<0.001	0.05	2.73	0.93	na
Metric Invariance			7555.84	2.575	<0.001	0.05	2.74	0.93	0.002
Scalar Invariance			7757.81	2.726	<0.001	0.05	2.81	0.93	0.001
SPSI-R 25 items
Time point (T1 vs. T2)
Configural Invariance			3064.46	530	<0.001	0.07	2.59	0.94	na
Metric Invariance			2971.15	550	<0.001	0.07	2.61	0.94	0.003
Scalar Invariance			2992.78	620	<0.001	0.06	2.66	0.94	0.001
Language (English vs. Spanish)
Configural Invariance			2240.34	530	<0.001	0.07	2.37	0.94	na
Metric Invariance			2230.13	550	<0.001	0.07	2.41	0.94	0.001
Scalar Invariance			2398.25	620	<0.001	0.06	2.54	0.93	−0.004

CFA, confirmatory factor analysis; CFI, comparative fit index; df, degrees of freedom; CFI ^Δ, difference in CFI; p, χ² p-value, RMSEA, root mean square error of approximation; WRMR, weighted root mean square residual; χ², model chi square; *the pattern of fixed and free parameters is the same; **the relative factor loadings are proportionally equal across groups; ***the relative indicator means are proportionally equal across groups.