This presentation describes the effort to develop and apply fidelity criteria in a formative way to an adapted psychoeducational intervention for trauma. The adaptation is designed for military veterans. Promoting recovery from trauma is a central focus for the Jail Diversion and Trauma Recovery Program in RI. The TAMAR model was selected by clinical staff leaders with the aspiration that it could become an evidence-based psycho-educational support intervention for veterans following arrest for criminal activities. An earlier TAMAR "manual" was developed for a different population, and this session addresses questions regarding the use of fidelity assessment by evaluators in a formative context, with an evolving intervention targeting varied client groups. What approaches to defining and measuring fidelity can help to formalize the intervention and support clinical staff trying to develop a training model for extending the application of the model across the state? Can session activities in individual modules be linked to clinician and client feedback methods for formative application? Distinct from a controlled trials context, this service-oriented project calls for its own solutions.#Alcohol,DrugAbuse,andMentalHealth #2011Conference