Table 6 Confirmatory factor analysis: goodness of fit summary for the adapted GRMS frequency items
Goodness of fit indices | CFI | SRMR | RMSEA | loglikelihood | AIC | BIC |
|---|---|---|---|---|---|---|
Model 1: Unidimensional graded response  | 0.9770 | 0.0750 | 0.1089 | -1661.28 | 3063.7 | 3273.9 |
Model 2: Bidimensional graded response  | 0.9913 | 0.0492 | 0.0799 | -1611.85 | 2994.0 | 3235.5 |
Model 3: Bifactor graded response  | 0.9882 | 0.0851 | 0.0504 | -1549.64 | 3223.3 | 3467.7 |