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Analysis of Variance for Power.
| Factor | df | F | η2 | p |
|---|---|---|---|---|
| Purification method | 2 | 3.58 | .07 | <.01 |
| Impact | 1 | 60.60 | .07 | <.01 |
| % DIF | 1 | 105.92 | .12 | <.01 |
| Sample size | 1 | 621.55 | .69 | <.01 |
| Test length | 1 | 4.34 | <.01 | .05 |
| Method × Impact | 2 | 0.73 | <.01 | .49 |
| Method × % DIF | 2 | 2.11 | <.01 | .14 |
| Method × Sample size | 2 | 0.65 | <.01 | .53 |
| Method × Test length | 2 | 1.74 | <.01 | .19 |
Note. DIF = differential item functioning; df = degrees of freedom.
