Table 4. Verification of homogeneity between the experimental and comparison groups
| M | SD | t(p) |
| DI & PSS | EG | 3.39 | 0.41 | .803(.426) |
| CG | 3.29 | 0.48 |
| JE | EG | 3.92 | 0.24 | .133(.510) |
| CG | 3.96 | 0.19 |
| TT | EG | 4.08 | 0.36 | .764(.746) |
| CG | 4.05 | 0.35 |
*EG: experimental group, CG: control group.