| Variable | F | Degrees of freedom | Mean squared error | p value* |
|---|---|---|---|---|
| Test | 18.03 | 3, 186 | 246.18 | < 0.001 |
| Question type | 160.03 | 1, 62 | 258.88 | < 0.001 |
| Group | 2.33 | 1, 62 | 568.70 | 0.1 |
| Test × Group | 0.820 | 3, 186 | 246.18 | 0.5 |
| Test × Question type | 13.66 | 3, 186 | 234.33 | < 0.001 |
| Question type × Group | 0.469 | 1, 62 | 258.88 | 0.5 |
| Test × Question type × Group | 1.81 | 3, 186 | 234.33 | 0.1 |
*2-tailed t test.