Consistent with the findings for one and two feedbacks, three-FCU engagers showed significant reductions in child problem behavior from age 2 to age 5 (B = −.46, p < .05); however, the indirect effect of the intervention on age 7.5 oppositional behavior was reduced to a trend (indirect B = −.23, p< .10). The significant intervention effect on problem behavior growth from ages 2 to 5 is shown in Figure 3. The effect size of the intervention compared with that of the control group from age 2 to 5 was large (d = .93) and small to medium for age 7.5 oppositional defiant problems (d = .47).
