Dr Andi Fugard is Deputy Director of NatCen’s Centre for Evaluation. They have over a decade of experience designing and delivering a wide variety of evaluations, including pilots, embedding outcomes monitoring in routine practice, cluster randomised controlled trials, and quasi-experimental evaluations, primarily in mental health and education. They have also conducted research on the psychology of reasoning under uncertainty, and methodology research, including developing a novel quantitative approach for choosing a sample size for qualitative studies. They are passionate about using social science and causal inference to improve people’s lives. Andi is a member of the UK government Evaluation and Trial Advice Panel, which advises civil servants and What Works Centres.