The ‘Evaluation and Mentoring of the Multi-Agency approach to violent radicalization’ (EMMA) project was established (1) to evaluate the multi-agency working approach and (2) to mentor peer-to-peer assessment and exchange best practices among local practitioners. The EMMA project tried to fill this gap in evaluation research by developing a self-evaluation tool for local multi-agency working practitioners that will be widely applicable across different multi-agency working approaches in E...