Table 4. Fit Indices and Scaled Chi-Square Difference Results for Confirmatory Factor Models of Executive Functions.
| Model Fit Indices | χ2 difference p | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
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| Model | χ2 | df | χ2 p | χ2 scaling factor | RMSEA (95% CI) | CFI | AIC | vs. Model 1 | vs. Model 2 | vs. Model 3 | vs. Model 4 |
| 1. Four factors: In, Sw, WM, Up | 62.31 | 58 | .326 | 1.07 | .012 (.00-.03) | .997 | 15128.45 | ||||
| 2. Three factors: In, Sw, WM-Up | 82.19 | 60 | .030 | 1.06 | .027 (.02-.04) | .984 | 15144.89 | 2.05e-6 | |||
| 3. Three factors: In-Sw, WM, Up | 76.86 | 60 | .070 | 1.06 | .024 (.00-.04) | .988 | 15139.49 | 1.77e-4 | N/A | ||
| 4. Two factors: In-Sw, WM-Up | 97.21 | 63 | .004 | 1.06 | .033 (.03-.05) | .976 | 15155.35 | 8.48e-7 | 2.93e-3 | 2.08e-4 | |
| 5. One factor: Common EF | 127.62 | 65 | <.001 | 1.07 | .044 (.03-.06) | .956 | 15184.86 | 3.45e-9 | 1.48e-7 | 1.06e-8 | 4.32e-6 |
Note. EF = executive function, In = Inhibition, Sw = Switching, WM = Working Memory, Up = Updating; χ2 = chi-square; RMSEA = Root Mean Square Error of Approximation; CFI = Comparative Fit Index; AIC = Akaike Information Criterion.