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

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

	n	Pre		Post		t	Effect size	n	Pre		Post		t	Effect size
		Intensity		Intensity			(d)		Problem		Problem			(d)
		M	SD	M	SD		(d)		M	SD	M	SD		(d)
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

Note. ECBI Eyberg Child Behavior Inventory, CDI Child-Directed Interaction phase, PDI Parent-Directed Interaction phase.
^*p < .10, ^**p < .05, ^***p < .001.
¹ Post in the Non-Clinical Comparison Group corresponds to a six months follow-up; This Non-Clinical Group only represents mothers.

ISSN: 1753-2000