Table 4 Goodness of fit indexes results from CFA of the Persian version of PES
Index | Calculated | Acceptable Range | ||
|---|---|---|---|---|
Model 1 (PES with 1 Factor) | Model 2 (PES with 2 Factors) | Model 3 (PES with 3 Factors) | ||
χ2 (P-value) | 409.985 (P < 0.001) | 360.692 (P < 0.001) | 351.052 (P < 0.001) | P < 0.05 |
χ2 /DF | 2.697 | 2.389 | 2.356 (P < 0.001) |  |
RMSEA | 0.092 | 0.084 | 0.068 (P < 0.001) | Good: < 0.08 Average: 0.08–0.1 Weak: > 0.1 |
CFI | 0.889 | 0.910 | 0.934 (P < 0.001) | > 0.9 |
NFI | 0.837 | 0.859 | 0.892 (P < 0.001) | > 0.9 |
PNFI | 0.669 | 0.680 | 0.700 (P < 0.001) | > 0.05 |
PCFI | 0.711 | 0.723 | 0.732 (P < 0.001) | > 0.05 |
IFI | 0.891 | 0.911 | 0.935 (P < 0.001) | > 0.9 |
TLI | 0.861 | 0.886 | 0.916 (P < 0.001) | > 0.9 |
AIC | 523.985 | 476.692 | 471.052 (P < 0.001) | The model with the lowest AIC offers the best fit |