Table 2.
Measurement Invariance of the m-PSSM by Age.
| Model | χ2 (df) | CFI | SRMR | RMSEA (90% CI) | Δχ2 (df) | ΔCFI | ΔSRMR | ΔRMSEA |
|---|---|---|---|---|---|---|---|---|
| Baseline | ||||||||
| Full sample | 14.49 (2)**** | 0.975 | 0.038 | 0.244 (0.137, 0.368) | ||||
| 10–13 years | 12.57 (2)*** | 0.976 | 0.052 | 0.299 (0.156, 0.467) | ||||
| 14–16 years | 2.31 (2)* | 0.999 | 0.018 | 0.058 (0.000, 0.305) | ||||
| Configural | 17.17 (4)*** | 0.979 | 0.040 | 0.250 (0.137, 0.378) | ||||
| Metric | 14.47 (8)* | 0.990 | 0.043 | 0.124 (0.000, 0.225) | 1.90 (4)* | 0.011 | 0.003 | −0.126 |
| Scalar | 33.05 (15)*** | 0.971 | 0.058 | 0.151 (0.081, 0.222) | 18.75 (7)*** | −0.019 | 0.015 | 0.027 |
| Scalar (τ3,1) | 25.87 (14)** | 0.981 | 0.054 | 0.127 (0.042, 0.203) | 11.76 (6)* | −0.009 | 0.011 | 0.003 |
| Strict | 34.21 (18)** | 0.974 | 0.069 | 0.131 (0.060, 0.197) | 9.19 (4)* | −0.007 | 0.015 | 0.004 |
Note. τ3,1 refers to the release of the constraint on the third threshold of item one to achieve partial invariance at the scalar level of testing.
*p > .05.
**p < .05.
***p < .01.
****p < .001.