Table 2 Fit index for unidimensionality assumption
RSF:8 | ISF:8 | |
|---|---|---|
PCA | ||
% of variance explained by first PC | 32.2 % | 30.9 % |
Ratio of first PC to second PC | 2.11 | 2.22 |
Number of first PC factor loading >0.33 | 7 out of 8 | 8 out of 8 |
CFA | ||
RMSEA | 0.088 | 0.102 |
NFI | 0.90 | 0.84 |
CFI | 0.91 | 0.85 |
p-value (Chi-square test) | <0.001 | <0.001 |
GFI | 0.96 | 0.94 |
Standardized RMSR | 0.041 | 0.043 |