Table 2. Model Fit of Original and Shortened Versions.
| Model | χ2WLSMV | df | CFI | RMSEA |
|---|---|---|---|---|
| SCOFA|15 | 410.94 | 90 | .993 | .016 |
| ACO|15 | 606.62 | 90 | .986 | .020 |
| GA|15 | 1,006.44 | 90 | .979 | .027 |
| SCOFA|20 | 777.51 | 170 | .990 | .016 |
| ACO|20 | 1,410.10 | 170 | .979 | .022 |
| GA|20 | 1,576.96 | 170 | .977 | .024 |
| SCOFA|25 | 1,409.38 | 275 | .986 | .017 |
| ACO|25 | 1,923.25 | 275 | .978 | .020 |
| GA|25 | 2,482.45 | 275 | .973 | .024 |
| 89 | 22,944.35 | 3,827 | .933 | .019 |
With respect to the models: Letters indicate the item selection algorithm: SCOFA = Stepwise Confirmatory Factor Analysis; ACO = Ant Colony Optimization; GA = Genetic Algorithm; Numbers refer to the number of items in the abridged version; 89 = Original version with 89 items. WLSMV = Weighted Least Squares Mean and Variance adjusted. CFI = Comparative Fit Index. RMSEA = Root Mean Square Error of Approximation.