| Intervention | N | Mean | Std. Deviation | F-Value | p-Value |
| 1 | 15 | 38.47 | 3.11 | ||
| 7 | 15 | 38.20 | 3.12 | ||
| 14 | 15 | 37.40 | 2.97 | ||
| 21 | 15 | 36.80 | 3.10 | 1.684 | 0.147* |
| 28 | 15 | 36.40 | 3.07 | ||
| 35 | 15 | 35.80 | 3.23 | ||
| Total | 90 | 37.18 | 3.16 |