| Source of variation | Sum of squares | df | Mean square | F | Effect size | sig |
| Pretest | 52.03 | 8 | 6.75 | 1.46 | 0.04 | 0.378 |
| Group | 162.56 | 1 | 162.56 | 35.15 | 0.43 | 0.004 |
| Error | 18.50 | 4 | 4.63 |
|