Table 3 Linear Mixed Models Linking Intervention Conditions to Disruptive and Prosocial Behaviors in Post-intervention

   Intercept

3.19

0.2

17.55

<  0.01

0.09

   Intercept

2.94

0.27

17.43

<  0.01

0.08

2.99

0.29

18.52

<  0.01

0.05

   Intervention

0.52

0.39

16.31

0.19

0.39

0.40

18.27

0.34

   Familial SES

0.27

0.42

98.93

0.52

   Intercept

2.52

0.34

39.80

<  0.01

0.03

   Intervention

0.98

0.46

36.72

0.04

   Familial SES

0.29

0.40

156.87

0.02

   Children’s sex

0.93

0.41

118.14

0.46

   Children’s sex * Intervention

−1.19

0.57

113.14

0.04

   Intercept

3.01

0.30

17.86

<  0.01

0.05

   Intervention

0.35

0.43

17.47

0.41

   Familial SES

0.17

0.67

146.49

0.80

   Familial SES * Intervention

0.17

0.86

110.96

0.84

   Intercept

7.08

0.16

14.95

<  0.01

0.08

   Intercept

7.31

0.22

14.52

<  0.01

0.07

7.28

0.23

17.76

<  0.01

0.03

   Intervention

−0.47

0.31

13.44

0.16

−0.46

0.31

17.45

0.16

   Familial SES

−0.04

0.35

109.28

0.92

   Intercept

4.22

0.46

167.29

<  0.01

<  0.01

   Children’s pre-intervention level of prosocial behaviours

0.46

0.06

144.98

<  0.01

   Intervention

−0.17

0.37

251.65

0.65

   Familial SES

0.09

0.3

20.02

0.77

   Children’s sex

0.31

0.32

251.81

0.34

   Children’s sex * Intervention

−0.24

0.42

251.25

0.57

   Intercept

7.34

0.23

18.19

<  0.01

0.03

   Intervention

−0.48

0.34

17.72

0.17

   Familial SES

−0.06

0.45

110.91

0.89

   Familial SES * Intervention

−0.07

0.61

94.10

0.91