Table 2.
Confirmatory Factor Analysis Fit Statistics for WAIS –IV.
| Model | ×2 | df | CFI | TLI | AIC | BIC | RMSEA | 90%CI | TLI DIFF | BIC DIFF | RMSEA DIFF |
|---|---|---|---|---|---|---|---|---|---|---|---|
| One factor | 164.51 | 35 | 0.838 | 0.791 | 7437.59 | 7436.02 | 0.151 | 0.175 | |||
| Two factors | 121.28 | 34 | 0.891 | 0.855 | 7396.35 | 7394..71 | 0.126 | 0.15 | 0.064 | 41.31 | 0.025 |
| Three factors | 80.07 | 32 | 0.94 | 0.915 | 7359.14 | 7357.34 | 0.096 | 0.123 | 0.06 | 37.37 | 0.03 |
| Four factors | 50.38 | 29 | 0.973 | 0.958+. | 7335.45 | 7333.42 | 0.067 | 0.098 | 0.043 | 23.92 | 0.029 |
| Hierarchical Models | |||||||||||
| Higher order | 58.71 | 31 | 0.965 | 0.95 | 7339.78 | 7337.91 | 0.074 | 0.103 | −0.008 | −4.49 | −0.007 |
| Bi-factor | 37.18 | 27 | 0.987 | 0.979 | 7326.25 | 7324.06 | 0.048 | 0.083 | 0.022 | 13.85 | 0.026 |
Note: CFI = comparative fit index; TLI = Tucker-Lewis Index; AIC = Akaike Information Criterion; BIC = Bayesian Information Criterion; RMSEA = root mean square error of approximation; CI = confidence interval; DIFF = difference.