. Author manuscript; available in PMC: 2024 Jul 1.

Published in final edited form as: Fam Relat. 2022 Feb 7;72(3):719–733. doi: 10.1111/fare.12652

TABLE 3.

Tests of measurement invariance of the PPSM across acculturation levels

Model	χ² (df)	CFI/TLI	RMSEA	SRMR	p value^a
Eight-item PPSM
Configural invariance	51.01 (40)	.98/.98	.04	.03	—
Weak factorial invariance	59.99 (47)	.98/.98	.04	.04	.25
Strong factorial invariance	70.98 (54)	.98/.98	.05	.04	.09
Strict factorial invariance	77.85 (62)	.98/.98	.04	.05	.50
Four-item PPSM
Configural invariance	3.34 (4)	1.00/1.00	.00	.01	—
Weak factorial invariance	7.48 (7)	.99/.99	.02	.03	.18
Strong factorial invariance	10.65 (10)	.99/.99	.02	.03	.37
Strict factorial invariance	12.65 (14)	1.00/1.00	.00	.03	.70

Note. First generation, n = 167; second generation, n = 106. CFI = comparative fit index; PPSM = Pediatric Psychological Stress Measure; RMSEA = root mean square error of approximation; SRMR: standardized root mean square residual; TLI = Tucker–Lewis index.

χ² test.