Over the past few years, behavioural science has been in the midst of a crisis. A surprising proportion of published studies have failed to replicate when the interventions were repeated. In this session, Ben Goldacre and Professor Dean Karlan explore what has happened since the crisis struck and whether we have fully learnt the lessons from this period. Sir Kevan Collins of the Education Endowment Foundation chairs this session with Dr Ben Goldacre of Oxford and Professor Dean Karlan of Northwestern University.