Table 5.
Genetic and environmental parameter estimates and fit indices for the sex-equated univariate model of victimization at primary school and secondary school
| Variance Components |
Fit Indices (Compared to Full Model) |
|||||
|---|---|---|---|---|---|---|
| Victimization | A | C | E | Δχ2 | Δdf | p |
| Primary School | ||||||
| Full model (ACE) | 0.55 | 0.15 | 0.30 | — | — | — |
| AE model | 0.71 | — | 0.29 | 2.11 | 1 | .15 |
| CE model | — | 0.58 | 0.42 | 24.24 | 1 | <.001 |
| Secondary School | ||||||
| Full model (ACE) | 0.63 | 0.13 | 0.24 | — | — | — |
| AE model | 0.77 | — | 0.23 | 1.58 | 1 | .21 |
| CE model | — | 0.62 | 0.38 | 34.40 | 1 | <.001 |
Note: For the model on primary school data, thresholds and parameters could be equated across gender without significant loss of model fit (Δχ2 = 8.3; Δdf = 4, p = 0.1). For the secondary school model, parameter estimates could be equated across gender without significant loss of model fit (Δχ2 = 3.0; Δdf = 2, p = 0.2), but thresholds could not (Δχ2 = 6.8; Δdf = 2, p = 0.03), reflecting the mean gender differences observed in victimization at secondary school. A, additive genetic; C, shared environment; E, nonshared environment.