Public integrity systems aim to generate decisions by public officials that align with the public interest. As a consequence, many integrity policies seek to directly or indirectly guide and govern human choices or behaviour. In spite of this, the behavioural perspective is still neglected in integrity policy making. Researcher in various scientific fields (including psychology, neuroscience, sociology and economics) on human cognition and behaviour has produced findings that offer valuable lessons and new perspectives. As a result, policy makers worldwide are increasingly applying behavioural insights to other areas of public policy (Economist, 2017); (European Commission, 2016); (OECD, 2017); (World Bank, 2015).