| Variable | F | Degrees of freedom | Mean squared error | p value |
|---|---|---|---|---|
| Test questions | ||||
| Test | 37.35 | 3, 186 | 201.48 | < 0.001 |
| Group | 4.58 | 1, 62 | 245.56 | 0.04 |
| Test × Group | 1.99 | 3, 186 | 201.48 | 0.1 |
| Control questions | ||||
| Test | 0.412 | 3, 186 | 279.03 | 0.7 |
| Group | 0.554 | 1, 62 | 582.02 | 0.5 |
| Test × Group | 0.809 | 3, 186 | 279.03 | 0.5 |
*2-tailed t test.