Sex

Grade

Boys

Girls

First

Second

Mean (SD)

Mean (SD)

P

Effect

size

Mean (SD)

Mean (SD)

P

Effect

size

Ability to control Verbal and Physical Aggressiveness

5.5 (1.2)

6.1 (0.8)

<0.001

0.57

5.8 (1.1)

5.9 (1)

0.001

0.13

Problem Solving

4.7 (1.3)

4.9 (1.2)

<0.001

0.16

4.8 (1.2)

4.8 (1.2)

0.730

0.01

Concentration of Attention

4.7 (1.5)

5.3 (1.4)

<0.001

0.40

5.0 (1.5)

4.9 (1.5)

0.068

0.07

Participation/Cooperation in class

5.0 (1.1)

5.5 (1.0)

<0.001

0.53

5.2 (1.1)

5.2 (1.1)

0.598

0.02

Empathy

4.9 (1.1)

5.3 (1.1)

<0.001

0.43

5.1 (1.1)

5.1 (1.1)

0.857

0.01

Emotions’ Management

4.5 (1.2)

5.1 (1.1)

<0.001

0.47

4.7 (1.2)

4.9 (1.2)

<0.001

0.18

Friendship skills

5.2 (0.9)

5.3 (0.9)

<0.001

0.15

5.2 (0.9)

5.2 (0.9)

0.358

0.04

Ability to control Victimization

6.0 (1.0)

6.3 (0.8)

<0.001

0.36

6.1 (0.9)

6.2 (0.9)

<0.001

0.16

Emotions’ Identification and Expression

4.2 (1.1)

4.5 (1.1)

<0.001

0.28

4.4 (1.1)

4.3 (1.1)

0.597

0.02

Use of Spoken and Written Language

4.6 (1.2)

4.9 (1.2)

<0.001

0.20

4.7 (1.2)

4.8 (1.2)

0.002

0.12

Responsibility Taking

4.7 (1.1)

5.1 (1.1)

<0.001

0.39

4.8 (1.1)

4.9 (1.1)

<0.001

0.15