The Danger of a Single Study

This chapter outlines how taking a more systematic approach to developing responsive evidence bases that can inform research, policy, and practice on community health worker (CHW) training in low and middle-income countries (LMICs) supports the provision of more effective and equitable CHW programmes. It also explores methodologies and tools to develop such evidence bases and how these can and have been used to inform decision-making. We argue that by focusing on single primary studies rather than the combined body of evidence, research and practice on the training of CHWs in LMICs is overlooking systemic patterns in the evidence base. Decisions on which types of training programmes to implement in LMICs are often based on single evaluations of programmes conducted out of context or informed by general principles for workplace-based learning. Better matching research and practice needs with the available evidence base will facilitate a more effective translation of knowledge on the training of CHWs into practice and policy decisions.