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Simulation Conditions.
| Condition | Test length | Sample size | % DIF items | Impact |
|---|---|---|---|---|
| 1 | 15 | 500 | 0 | 0 |
| 2 | 30 | — | — | — |
| 3 | 15 | 1,000 | — | — |
| 4 | 30 | — | — | — |
| 5 | 15 | 500 | 20 | — |
| 6 | 30 | — | — | — |
| 7 | 15 | 1,000 | — | — |
| 8 | 30 | — | — | — |
| 9 | 15 | 500 | 33 | — |
| 10 | 30 | — | — | — |
| 11 | 15 | 1,000 | — | — |
| 12 | 30 | — | — | — |
| 13 | 15 | 500 | 0 | −0.5 |
| 14 | 30 | — | — | — |
| 15 | 15 | 1,000 | — | — |
| 16 | 30 | — | — | — |
| 17 | 15 | 500 | 20 | — |
| 18 | 30 | — | — | — |
| 19 | 15 | 1,000 | — | — |
| 20 | 30 | — | — | — |
| 21 | 15 | 500 | 33 | — |
| 22 | 30 | .— | — | — |
| 23 | 15 | 1,000 | — | — |
| 24 | 30 | — | — | — |
Note. DIF = differential item functioning.
