Pre | Post | Change | |||||
Factor (Cronbach’s α) | Group | Mean (SD) | Mean (SD) | Mean (SD) | P** | Effect size | P‡ |
Concentration of attention (0.91) | Intervention | 46.9 (12.2) | 53.5 (12.0) | 6.6 (9.6) | <0.001 | 0.55 | <0.001 |
Control | 48.2 (13.3) | 52.2 (13.0) | 4 (9.1) | <0.001 | 0.31 | ||
P* | 0.100 | 0.700 | |||||
Verbal/physical aggressiveness control (0.91) | Intervention | 73.5 (17.3) | 81.9 (15.6) | 8.4 (13.9) | <0.001 | 0.51 | <0.001 |
Control | 75.3 (16.9) | 79.2 (15.4) | 3.9 (13.5) | <0.001 | 0.24 | ||
P* | 0.175 | 0.287 | |||||
Friendship skills (0.92) | Intervention | 44.8 (10.4) | 49.2 (9.9) | 4.4 (8.2) | <0.001 | 0.43 | 0.235 |
Control | 45 (11.3) | 48.9 (9.9) | 3.9 (8) | <0.001 | 0.37 | ||
P* | 0.706 | 0.574 | |||||
Empathy (0.89) | Intervention | 31.7 (8.5) | 38.1 (8.3) | 6.4 (7.9) | <0.001 | 0.76 | <0.001 |
Control | 32.6 (7.8) | 36.2 (8.5) | 3.5 (8.0) | <0.001 | 0.43 | ||
P* | 0.138 | <0.001 | |||||
Participation /cooperation in class (0.90) | Intervention | 50 (11.5) | 56.1 (11.2) | 6.1 (9.6) | <0.001 | 0.54 | <0.001 |
Control | 51.3 (12.0) | 55.4 (12.1) | 4.1 (9.3) | <0.001 | 0.34 | ||
P* | 0.117 | 0.023 | |||||
Emotions’ identification and management (0.91) | Intervention | 64.6 (15.0) | 74.8 (15.8) | 10.1 (13.2) | <0.001 | 0.66 | <0.001 |
Control | 66.6 (17.5) | 71.6 (16.5) | 5.1 (13.5) | <0.001 | 0.30 | ||
P* | 0.153 | 0.007 | |||||
Victimization control (0.87) | Intervention | 28.7 (6.4) | 30.5 (6.0) | 1.8 (5.2) | <0.001 | 0.28 | 0.011 |
Control | 29.4 (5.1) | 30.4 (5.0) | 1.0 (5.0) | 0.034 | 0.20 | ||
P* | 0.095 | 0.586 | |||||
Problem solving (0.92) | Intervention | 29.9 (9.0) | 36 (9.0) | 6.1 (7.3) | <0.001 | 0.68 | <0.001 |
Control | 30.7 (9.7) | 34.1 (9.5) | 3.4 (8.3) | <0.001 | 0.36 | ||
P* | 0.197 | <0.001 | |||||
Self-esteem (0.92) | Intervention | 52.2 (11.7) | 60 (12.1) | 7.8 (9.2) | <0.001 | 0.66 | 0.001 |
Control | 53.2 (11.0) | 60.1 (12.0) | 6.9 (8.9) | <0.001 | 0.60 | ||
P* | 0.262 | 0.139 |