IRT Model | DIF Size | DIF % | Diff. Mean θ | Robust Z | Bayes 95% CrI | ||
---|---|---|---|---|---|---|---|
TP% | FP% | TP% | FP% | ||||
1PL | 0.42 | 10 | 0 | 54.90 | 0.91 | 60.35 | 1.36 |
1 | 70.00 | 2.36 | 66.35 | 3.88 | |||
30 | 0 | 69.66 | 0.29 | 70.67 | 0.44 | ||
1 | 71.09 | 1.05 | 71.91 | 2.58 | |||
0.63 | 10 | 0 | 78.00 | 0.56 | 83.00 | 0.89 | |
1 | 75.00 | 3.56 | 81.00 | 5.22 | |||
30 | 0 | 82.67 | 2.57 | 87.00 | 3.00 | ||
1 | 76.33 | 2.14 | 79.33 | 3.29 | |||
2PL | 0.42 | 10 | 0 | 60.82 | 0.06 | 60.42 | 0.06 |
1 | 58.24 | 2.09 | 55.10 | 3.89 | |||
30 | 0 | 62.71 | 0.14 | 66.09 | 0.28 | ||
1 | 66.00 | 4.86 | 66.33 | 6.86 | |||
0.63 | 10 | 0 | 72.00 | 0.33 | 77.00 | 0.55 | |
1 | 70.00 | 2.39 | 77.00 | 3.56 | |||
30 | 0 | 72.33 | 3.14 | 77.67 | 3.14 | ||
1 | 66.33 | 3.33 | 69.00 | 5.00 | |||
Average | 69.13 | 1.86 | 71.76 | 2.75 |