Abstract: | Abstract The continued devolution of social welfare systems and services in the U.S. resultsin high stakes program evaluations in the field of family support and early intervention. Programs are expected to utilize evidence-based interventions and to demonstrate effectiveness. A look at implementation helps to differentiate between theories that do not work and programs that are not effective. Methods for identifying program implementation are needed. In a 17-site program evaluation, the author and her colleagues developed a methodology for measuring implementation and demonstrated the effects of differential implementation in understanding program outcomes. |