Scaling up an Empirically Supported Intervention with Long-Term Outcomes: the Nationwide Implementation of GenerationPMTO in Norway.

Effective implementation outcomes are necessary preconditions for effective service and positive treatment outcomes for children with behavioral problems. The aim of this study is to assess outcomes of the transfer of the empirically supported intervention GenerationPMTO from the developer in the USA to a nationwide implementation in Norway. Adoption, sustainability, reach, and fidelity are tested across seven generations of therapists in Norway. Participants in the study were 521 therapists who began training in the program. The developer's team trained the first generation (G1) and the Norwegian team trained the next six generations (G2-G7). The mean rate of certification was 94.2% (n = 491). Intervention fidelity was assessed from 1964 video recordings of intervention sessions submitted for certification evaluation using the observation-based measure Fidelity of Implementation Rating System (FIMP). A small but significant drop in fidelity scores was previously observed from G1 to G2; however, fidelity scores recovered at or above G1 scores for G3 Forgatch and DeGarmo (Prevention Science 12, 235-246, 2011). Twenty years since the inception of implementation, 314 certified therapists practice the model today, a retention rate of 64%. The outcomes show sustained fidelity scores across seven generations, increasing heterogeneity among therapists trained, and a shift of focus in the target population from clinical to primary services. The present study contributes to the field with the systematic evaluation of outcomes for the full transfer implementation approach with continuing adoption and sustainability, increasing reach and sustained intervention fidelity across several generations of practitioners.