Realist evaluation of social and behaviour change interventions: Co-building theory and evidence of impact

Background: A complexity-aware approach, realist evaluation is ideal for norms-shifting interventions (NSIs), which are not well-understood but gaining prominence in behaviour change programming in Africa and globally to foster enabling socionormative environments that sustain behaviour change. A new application of realist evaluation to NSIs uses an adapted approach employing realism values that is suitable for social and behaviour change (SBC) programme evaluation more generally.Objectives: This article shares the authors’ reflections on tailoring realist evaluation approaches for use with community-based norms-shifting programmes. It describes how realist evaluation enables co-building of programme theory that conceptually underpins NSIs, guides evaluation efforts and yields benefits beyond theory-proving.Method: Two NSIs in Niger and Senegal illustrate how locally refined theories of change (TOC) and identification of evidence gaps in causal pathways guided a series of rapid programme and quasi-experimental outcome studies. Over two years externally and internally led studies assessed intermediate or mediating norms-shifting effects and outcomes comprising the realist evaluation. Studies drew from experiential, existing and new data.Results: The tailored approach created a co-owned evaluation, from joint exploration of SBC theory to review of evidence generation. Five values applied to the research–practice partnerships reinforced a realist perspective: participatory, complexity, shared ownership, practice-oriented and valuing all forms of data.Conclusion: Bounded by TOC exploration for programme inquiry, realist evaluation embeds learning and assessment concretely into local programming and knowledge building. Integrating evaluation practice with realism values creates a nexus and a unique and significant dynamic between programme implementers and evaluators that transcends NSI research and programme practice.