Table 1.
Fit indices for MGCFA models and difference tests between the two age groups. nihcog_lswm: NIH Cognition List Sorting Working Memory, vpa_fr_delay: Verbal Paired associates delayed Free Recall. * indicates significant difference (chi-square difference tests between the original model without assuming measurement invariance and the comparison model).
| df | AIC | BIC | Chisq | Pr(> chisq) | |
|---|---|---|---|---|---|
| 1 Configural | 144 | 8958.459 | 9292.437 | 210.792 | |
| 2 Metric | 155 | 8971.5 | 9266.4 | 246.567 | 0.000* |
| 2a Partial metric (except nihcog_lswm) | 154 | 8961.276 | 9259.724 | 232.182 | 0.021* |
| 2b Partial metric (except nihcog_lswm, vpa_fr_delay) | 153 | 8957.725 | 9259.727 | 226.586 | 0.076 |
| 3 Partial strong | 164 | 8938.254 | 9201.173 | 229.243 | 0.995 |
| 4 Partial strict | 178 | 8937.019 | 9150.197 | 253.112 | 0.054 |