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Table 2 Changes on the Eyberg Child Behavior Inventory (ECBI)

From: Parent–child interaction therapy for preschool children with disruptive behaviour problems in the Netherlands

  n Pre Post t Effect size n Pre Post t Effect size
Intensity Intensity (d) Problem Problem (d)
M SD M SD M SD M SD
Mothers               
CDI 25 156.4 32.0 128.2 28.9 6.2*** .92 23 20.4 8.3 17.3 8.0 2.5** .38
PDI 24 127.3 28.3 102.8 23.7 4.5*** .94 22 16.5 7.5 7.9 6.7 4.8*** 1.21
Total treatment 23 154.0 32.2 100.2 20.5 8.4*** 1.99 21 20.0 8.5 7.8 6.9 5.6*** 1.56
Fathers               
CDI 14 151.9 31.8 128.9 34.8 2.6** .69 12 21.4 6.8 15.8 10.1 2.2* .65
PDI 16 126.4 31.9 101.9 31.2 3.3* .78 15 15.5 9.3 7.9 8.9 3.8** .83
Total treatment 15 153.3 30.9 101.0 24.3 6.7*** 1.88 12 19.8 7.2 8.0 8.9 5.9*** 1.48
Non-clinical group 1 59 80.5 20.4 80.8 22.8 -.2 -.02 56 3.3 5.3 2.3 4.2 1.8 .21
  1. Note. ECBI Eyberg Child Behavior Inventory, CDI Child-Directed Interaction phase, PDI Parent-Directed Interaction phase.
  2. *p < .10, **p < .05, ***p < .001.
  3. 1 Post in the Non-Clinical Comparison Group corresponds to a six months follow-up; This Non-Clinical Group only represents mothers.