This chapter clarifies the distinction between psychosocial interventions (what is done to change clinical problems) and the way in which the interventions are presented or provided (models of delivery). The dominant model of psychosocial treatment delivery, which involves in-person, one-to-one therapy with a mental health professional in a special setting, is discussed, along with inherent limitations in reaching large numbers of people in need of services. The chapter presents characteristics that would be needed in a model of delivery to overcome these limitations. These characteristics include scalability, reach, affordability, expansion of the nonprofessional workforce, expansion of settings where interventions are provided, feasibility, flexibility, and acceptability of the model of delivery.
