Table 2.
Goodness of fit
| Model | CFIa | TLIb | RMSEAc |
|---|---|---|---|
| (1) First order model (3 factors) | 0.873 | 0.867 | 0.067 |
| (2) Fist order model (3 factors + eyesight component) | 0.945 | 0.942 | 0.042 |
| (3) General-specific model | 0.956 | 0.952 | 0.039 |
aComparative Fit Index
bTucker–Lewis Index
cRoot mean square error of approximation