| Group | Mean | Standard Deviation | t | Sig. | ||
| Pre | Post | Pre | Post | |||
| Intervention | 16.90 | 18.80 | 5.325 | 5.931 | −5.803 | 0.000* |
| Control 1 | 18.19 | 18.49 | 4.974 | 5.876 | −0.782 | 0.435 |
| Control 2 | 18.12 | 17.94 | 5.815 | 5.815 | 0.565 | 0.572 |