β*

SE**

P

Concentration of attention

2.97

0.72

<0.001

Verbal/physical aggressiveness control

3.44

1.04

0.001

Friendship skills

0.38

0.60

0.524

Empathy

2.99

0.59

<0.001

Participation/ cooperation in class

3.20

0.76

<0.001

Emotions’ identification

and management

4.35

1.00

<0.001

Victimization control

1.06

0.41

0.011

Problem solving

3.03

0.57

<0.001

Self-esteem

2.06

0.69

0.003