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Table 2 Comparison of pre and post intervention scores on outcome measures for the experimental group (N = 18)

From: Effects of problem-solving interventions on aggressive behaviours among primary school pupils in Ibadan, Nigeria

No

Variable

Pre-intervention

Post-intervention

t test t (df)

p value

1

Total TRAB (mean, SD) [range of 0–42]

29.6 (6.9)

18.2 (8.6)

5.18 (17)

<0.001*

2

SDQ (mean, SD)

 Emotional

3.9 (1.5)

4.6 (1.7)

−1.23 (17)

0.24

 Conduct

6.17 (2.5)

6.0 (3.4)

0.24 (17)

0.81

 Hyperactivity

5.9 (2.4)

7.6 (4.9)

−1.40 (17)

0.18

 Peer problems

5.5 (2.0)

6.3 (2.7)

−1.05 (17)

0.31

Total difficulties score [range of 0–40]

21.5 (5.6)

24.4 (7.8)

−1.35 (17)

0.19

 Prosocial

7.7 (3.8)

6.8 (3.9)

1.76 (17)

0.10

3

SRAS (mean, SD) [range of 0–14]

8.7 (4.3)

6.1 (4.9)

2.47 (17)

0.02*

4

ATAQ (mean, SD) [range of 19–76]

 Retaliation belief

9.4 (3.3)

5.8 (2.7)

5.37 (17)

<0.001*

 General belief

21.8 (5.5)

17.2 (5.5)

4.14 (17)

0.001*

 Coping strategies

16.8 (3.1)

22.1 (2.8)

−4.42 (17)

<0.001*

5

SCAS (mean, SD) [range of 0–28]

16.2 (6.4)

13.8 (5.3)

1.79 (17)

0.09

  1. Two students dropped out
  2. TRAB Teacher rating of aggressive behaviours (total maximum score = 42), SDQ Strengths and Difficulties Questionnaire (total maximum score = 40), SRAS Self rated aggression scale (total maximum score = 14), ATAQ Attitude towards aggression questionnaire (total maximum score = 76), SCAS Social cognition and attribution scale (total maximum score = 28)
  3. * Data was statistically restricted with Bonferonni adjustment