Table 4.

Comparison of between group effect size estimates of ez ParentProgram (n=40 control; n=39 intervention) and group CPP (n=237 control; n=267 intervention).

	Effect Sizes
Variable	Time 1-2 a,b		Time 1-3 a-c
	ez Parent	Group CPP a	ez Parent	Group CPP d
Parent warmth (PQ e)	0.07	-0.06	0.31	0.10
Parent corporal punishment (PQ e)	-0.13	0.15	0.14	0.26
Parent follow through (PQ)	0.23	0.17	0.18	0.08
Parenting self-efficacy (TCQ f)	-0.09	0.21	0.13	0.22
Parenting stress (PSI-SF g)	-0.01	-- b	0.19	-- i
Child behavior problems (ECBI h)	-0.18	-0.06	-0.01	0.05
Child behavior intensity (ECBI)	0.00	0.19	0.18	0.20

^aBaseline.

^b12 weeks post baseline.

^c24 weeks post baseline.

^dEffect sizes estimated from data in Breitenstein et al [ 15].

^eAbb: Parent Questionnaire.

^fAbb: Toddler Care Questionnaire.

^gAbb: Parenting Stress Index;

^hAbb: Eyberg Child Behavior Inventory.

ⁱPSI-SF was not reported in Breitenstein et al [ 15].