Table 2.
Effect sizes and standard errors of multilevel models for post-intervention Dutch, English, and mathematics grades Study 1.
| Grades |
|||
|---|---|---|---|
| Dutch (SE) | English (SE) | Mathematics (SE) | |
| Gendera | -0.53 (0.15)** | -0.13 (0.15) | -0.03 (0.14) |
| Ethnic Backgroundb | -0.41 (0.23) | -0.03 (0.24) | -0.53 (0.23)* |
| Conditionc | 0.13 (0.14) | 0.12 (0.14) | 0.06 (0.13) |
| Ethnic background ∗ Gender | -0.46 (0.27) | -0.22 (0.28) | -0.40 (0.26) |
| Gender ∗ Condition | -0.05 (0.21) | -0.32 (0.21) | -0.04 (0.19) |
| Ethnic background ∗ Condition | 0.05 (0.26) | -0.11 (0.27) | 0.06 (0.25) |
∗p < 0.05, ∗∗p < 0.01, ∗∗∗p < 0.001. Parameter estimates (while controlling for effects of other parameters) can be interpreted as Cohen’s d; aGirl = 0, Boy = 1; bNative Dutch = 0, Ethnic minority = 1; cValues-affirmation = 0, Control = 1.