Table 3. Effect of training programs on self- and mother-reported bullying victimization and perpetration, as examined using the linear mixed-effect model.
| Within-subject analysis | Between-subject analysis | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| df | Mean square | F | p | df | Mean square | F | p | ||
| Self-reported victimization of bullying | |||||||||
| Time | 1 | 29.328 | 9.706 | .003 | Intercept | 1 | 905.093 | 43.971 | < .001 |
| Group x Time | 1 | .226 | .075 | .786 | Group | 1 | .399 | .019 | .890 |
| Error | 47 | 3.022 | Error | 47 | 20.584 | ||||
| Self-reported perpetration of bullying | |||||||||
| Time | 1 | 11.502 | 6.371 | .015 | Intercept | 1 | 320.073 | 29.448 | < .001 |
| Group x Time | 1 | .359 | .199 | .658 | Group | 1 | .849 | .078 | .781 |
| Error | 47 | 1.805 | Error | 47 | 10.869 | ||||
| Mother-reported victimization of bullying | |||||||||
| Time | 1 | 61.341 | 9.048 | .004 | Intercept | 1 | 4335.602 | 184.181 | < .001 |
| Group x Time | 1 | 29.912 | 4.412 | .041 | Group | 1 | .010 | .000 | .984 |
| Error | 47 | 6.780 | Error | 47 | 23.540 | ||||
| Mother-reported perpetration of bullying | |||||||||
| Time | 1 | .767 | .310 | .580 | Intercept | 1 | 1159.146 | 65.484 | < .001 |
| Group x Time | 1 | 4.685 | 1.894 | .175 | Group | 1 | .288 | .016 | .899 |
| Error | 47 | 2.474 | Error | 47 | 17.701 | ||||
Time: pretraining vs. posttraining; Group: theory of mind performance training vs. social skills training