Table 3.
Model Fit of the Two-level 1-PL and 2-PL for the EDS and REDI
| Model | Number of Parameters |
Log-likelihood | AIC | BIC | Likelihood Ratio Test | |||
|---|---|---|---|---|---|---|---|---|
| Comparison | Δχ2 | Δdf | p value | |||||
| EDS Discrimination Frequency (EDS-DF) | ||||||||
| 1-PL | 7 | −1866.15 | 3746.31 | 3790.00 | ||||
| 2-PL | 15 | −1851.09 | 3732.17 | 3825.81 | 1-PL | 20.98 | 8 | .007 |
| 2-PL(D) | 11 | −1855.90 | 3733.79 | 3802.46 | 2-PL | 9.22 | 4 | .056 |
| 2-PL(P) | 11 | −1852.08 | 3726.16 | 3794.83 | 2-PL | 1.36 | 4 | .851 |
| EDS Attribution to Ethnicity/Race (EDS-AER) | ||||||||
| 1-PL | 7 | −1171.97 | 2357.93 | 2401.63 | ||||
| 2-PL | 15 | −1154.33 | 2338.66 | 2432.30 | 1-PL | 28.71 | 8 | < .001 |
| 2-PL(D) | 11 | −1158.49 | 2338.98 | 2407.65 | 2-PL | 6.89 | 4 | 0.142 |
| 2-PL(P) | 11 | −1161.49 | 2344.98 | 2378.70 | 2-PL | 12.00 | 4 | 0.017 |
| Racial/Ethnic Discrimination Index (REDI) | ||||||||
| 1-PL | 8 | −1685.45 | 3386.90 | 3436.81 | ||||
| 2-PL | 18 | −1639.29 | 3314.58 | 3426.87 | 1-PL | 38.20 | 10 | < .001 |
| 2-PL(D) | 13 | −1672.27 | 3370.54 | 3451.65 | 2-PL | 1467.91 | 5 | < .001 |
| 2-PL(P) | 13 | −1650.83 | 3327.67 | 3408.77 | 2-PL | 12.59 | 5 | .028 |
Note. 2-PL(D) is a variant of the 2-PL model in which the daily-level item loadings are constrained to be equal across all items. 2-PL(P) is a variant of the 2-PL model in which the participant-level item loadings are constrained to be equal across all items. AIC is Akaike Information Criterion. BIC is Bayesian Information Criterion (BIC). Δχ2 is the χ2 difference. Δdf is the difference of degrees of freedom.