Developing theories of change for social programmes: co-producing evidence-supported quality improve

For much of the past two decades, expensive and often imported evidence based programmes (EBPs) developed by clinician-researchers have been much in vogue in the family and parenting support field, as in many other areas of social provision. With their elaborate infrastructures, voluminous research bases and strict licensing criteria, they have seemed to offer certainty of success over less packaged, less well-evidenced locally developed approaches. Yet recently, evaluation research is showing that success is not assured. EBPs can and regularly do fail, at substantial cost to the public purse. In times of severe resource pressure, a pressing question is, therefore,