Sample | Intervention Epoch | School level | N | Mean | SD | Df | t-value | p-value |
Before | Primary | 315 | 2.72 | .84 | 555 | .315 | .753 | |
Secondary | 242 | 2.74 | .84 | |||||
After | Primary | 413 | 1.61 | .46 | 661 | 2.280 | .023 | |
Secondary | 250 | 1.70 | .52 |