The focus of this think tank will be on re-conceptualizing the current approach to evaluating the implementation of “evidence-based practices” (EBPs). In most cases, implementation evaluations focus on the extent to which EBPs are implemented with fidelity to their original models. However, because EBPs are implemented in a wide variety of organizational, political and cultural contexts, evaluations of EBPs that maintain an exclusive focus on fidelity miss important contextual factors that may impact both the fidelity and effectiveness of interventions. As such, there is a need to develop broader evaluation frameworks that capture the factors that influence the success or failure of implementation. Preliminary frameworks derived from the implementation literature will be presented to generate a discussion that leads to the development of a new framework for implementation evaluation. #HumanServicesEvaluation #2010Conference