Table 4.
Fit Indices for Models Testing Different Degrees of Measurement Invariance of the Structural Model for Retested Participants and Dropouts Within Panels
| Model | χ2 | df | AIC | RMSEA | CFI | Δχ2a | Δdfa |
| Time 1: retested vs. dropout at Time 2 |
Panels 1–2 |
||||||
| Equal factor paths, SDs and correlations | 529 | 170 | 189 | .083 | .944 | ||
| Free correlations only | 529 | 166 | 197 | .084 | .943 | 0 | 4 |
| Free factor SDs and correlations | 514 | 156 | 202 | .087 | .944 | 15 | 10 |
| Configural invariance (all parameters free) |
510 |
140 |
230 |
.093 |
.942 |
4 |
4 |
| Time 1: retested vs. dropout at Time 2 |
Panel 3 |
||||||
| Equal factor paths, SDs and correlations | 563 | 170 | 223 | .075 | .951 | ||
| Free correlations only | 553 | 166 | 221 | .075 | .952 | 10 | 4 |
| Free factor SDs and correlations | 535 | 156 | 223 | .071 | .953 | 18 | 10 |
| Configural invariance (all parameters free) |
512 |
140 |
232 |
.081 |
.954 |
23 |
16 |
| Time 1 and 2: retested vs. dropout at Time 3 |
Panels 1–2 |
||||||
| Equal factor paths, SDs and correlations | 764 | 340 | 84 | .092 | .929 | ||
| Free correlations only | 732 | 332 | 68 | .091 | .933 | 32*** | 8 |
| Free factor SDs and correlations | 692 | 312 | 68 | .092 | .937 | 40 | 20 |
| Configural invariance (all parameters free) | 592 | 280 | 32 | .089 | .948 | 100*** | 32 |
a
Nested comparison of the current (more relaxed) model fit with the prior (more constrained) one.
***p < .001.