Impact Evaluation of a Foundational Training on Radicalisation and Extremism

By Aileen van Leeuwen and Amy-Jane Gielen

Executive Summary The Dutch National Training Institute against Radicalisation (Rijksopleidingsinstituut tegengaan Radicalisering, ROR) offers a broad range of training programmes on radicalisation and extremism for first- and second-line professionals from various sectors who may encounter these phenomena in their work. The one-day introductory training is the most frequently delivered course, with over one hundred sessions held in 2023. To assess the introductory training’s longer-term impact (six months after completion), the ROR commissioned an independent impact evaluation by the International Centre for CounterTerrorism (ICCT). The evaluation targeted all participants – first- and second-line professionals from various fields – who attended ROR’s introductory training between 14 November and 21 December 2023. The final report was delivered in August 2024. The design of the impact evaluation was based on the Kirkpatrick evaluation model, which provides a framework for measuring training outcomes. Additionally, a results monitoring framework was created to provide an overview of the intended outcomes, relevant indicators for tracking change over time, the methods used to collect data for each indicator, and the frequency of data collection. The evaluation employed a mixed methods approach, combining qualitative as well as quantitative indicators and research methods. The evaluation included three measurement points: a baseline prior to the training, a post-training measurement immediately after, and a follow-up conducted six months later. Three rounds of surveys were administered (N=235, N=221, N=88), followed by interviews with former participants six months after the training (N=8). In addition, two training sessions were observed, a focus group was held with stakeholders from the ROR and the National Coordinator for Security and Counterterrorism (NCTV), and a document analysis was carried out by the research team. Based on this data, the evaluation was able to answer the three key research questions guiding the study. 1. What is the expected and actual impact of the ROR introductory training on participants’ foundational knowledge, perceived ability to respond to signs of radicalisation and extremism, and intention to embed knowledge within their own organisations in the longer term (6 months)? Overall, the impact evaluation shows highly positive results, indicating that expectations and learning objectives were largely met for the majority of participants. At the end of the training, 90 percent of participants reported that the course met or exceeded their expectations. Only a small minority found the training either too basic – due to extensive prior knowledge – or difficult to follow because they struggled to connect it to their daily work. Foundational knowledge Both the ROR and the participants expected the training to strengthen participants’ foundational knowledge of radicalisation and extremism. The results strongly support this. • Firstly, the findings confirm that the training reached the right target audience – namely, professionals who are not yet experts on radicalisation and extremism and have had limited prior exposure to these topics. • Secondly, the content of the training was well-aligned with participants’ knowledge levels: those with limited prior understanding found it accessible, while those with more background also gained new insights. Participants reported a better grasp of the complexity of the topic, more practical tools, and a more nuanced understanding of radicalisation. • Thirdly, a statistically significant increase in knowledge was observed among participants, which was sustained after six months. The comparative analysis revealed that participants from the security domain with a secondary vocational education background (the Dutch so-called MBO-level) had the lowest baseline knowledge and experienced the most difficulty engaging with the content. This underscores the need for tailored approaches by trainers to better match participants’ prior knowledge and learning needs. While this customisation improves accessibility, it may lead to slight variations in training delivery and, ultimately, in participants’ knowledge outcomes.

The Hague: The International Centre for Counter-Terrorism (ICCT) , 2025. 9p.