Table 1.
Fit statistics for multilevel confirmatory factor analysis across six time points
| Model | FP | χ2 | RMSEA | CFI | BICa | ΔBICa |
|---|---|---|---|---|---|---|
| Unidimensional | 111 | 16,723.09 | .110 | .866 | 114,936.84 | – |
| Five correlated factors | 121 | 4,636.37 | .056 | .967 | 109,178.53 | 5,758.31 |
| Orthogonal bifactor | 148 | 3,134.42 | .045 | .979 | 108,386.26 | 797.27 |
BIC, Bayesian information criterion; CFI, comparative fit index; FP, free parameters; RMSEA, root mean squared error of approximation.
a
BIC values were obtained by rerunning the analysis with the maximum likelihood estimator. Change in BIC is calculated from the model in the line above.