How did it work? Who did it work for? Mediation in the context of a moderated prevention effect for children of divorce.

This study presents a reanalysis of data from an effective preventive intervention for children from divorced families to test mediation of program effects. The study involved 157 children, age 9-12 years, who were randomly assigned to a parenting program or a literature control condition. Program effects to reduce posttest internalizing problems were mediated through improvement in mother-child relationship quality. Program effects to reduce externalizing problems at posttest and 6 months were mediated through improvement in posttest parental methods of discipline and mother-child relationship quality. The study also describes a new methodology to test mediation of Program x Baseline Status interactions. Analyses demonstrate mediation effects primarily for children who began the program with poorer scores on discipline, mother-child relationship quality, and externalizing problems.

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