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PROTOCOL: Interventions to Prevent Cognitive and Behavioural Violent Radicalisation: A Systematic Review and Multilevel Meta‐Analysis

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  • Sara Valdebenito
  • Manuel Eisner

Abstract

This is a protocol for a Campbell systematic review. This review aims to systematically evaluate the available evidence on the effectiveness of various interventions aimed at reducing violent radicalisation and terrorism. Quantitative analysis will be employed to assess the overall impact and identify the factors that influence it. The key research questions are: (1) What interventions are successful (A successful intervention will be defined as one that effectively reduces cognitive radicalisation (e.g., extremist beliefs or ideological commitment), reduces behavioural radicalisation (e.g., intentions or actions related to violent extremism), prevents at‐risk individuals from becoming radicalised (counter‐radicalisation), or facilitates the disengagement and de‐radicalisation of individuals already involved in extremist activities or networks) in preventing or reducing violent radicalisation and terrorism? (2) Are certain preventive strategies more effective than others? (3) How do participants' characteristics influence programme outcomes? (4) How do the features of interventions, their implementation, and methodologies impact the effectiveness of terrorism prevention? The review will conduct analyses considering participant characteristics (e.g., age, gender, risk level), intervention components (e.g., theoretical foundations, theory of change), implementation (e.g., facilitator training, dosage), and methodological aspects (e.g., study design). The goal is to identify the most effective interventions, the target groups they work for, and the conditions under which they are most successful.

Suggested Citation

  • Sara Valdebenito & Manuel Eisner, 2025. "PROTOCOL: Interventions to Prevent Cognitive and Behavioural Violent Radicalisation: A Systematic Review and Multilevel Meta‐Analysis," Campbell Systematic Reviews, John Wiley & Sons, vol. 21(3), September.
    • Handle: RePEc:wly:camsys:v:21:y:2025:i:3:n:e70058
    DOI: 10.1002/cl2.70058
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    References listed on IDEAS

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    1. Mohammed Hafez & Creighton Mullins, 2015. "The Radicalization Puzzle: A Theoretical Synthesis of Empirical Approaches to Homegrown Extremism," Studies in Conflict and Terrorism, Taylor & Francis Journals, vol. 38(11), pages 958-975, November.
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    4. Sarah L. Carthy & Colm B. Doody & Katie Cox & Denis O'Hora & Kiran M. Sarma, 2020. "Counter‐narratives for the prevention of violent radicalisation: A systematic review of targeted interventions," Campbell Systematic Reviews, John Wiley & Sons, vol. 16(3), September.
    5. Lorraine Mazerolle & Adrian Cherney & Elizabeth Eggins & Angela Higginson & Lorelei Hine & Emma Belton, 2020. "PROTOCOL: Police programs that seek to increase community connectedness for reducing violent extremism behaviour, attitudes and beliefs," Campbell Systematic Reviews, John Wiley & Sons, vol. 16(1), March.
    6. Sara Valdebenito & Manuel Eisner & David P. Farrington & Maria M. Ttofi & Alex Sutherland, 2018. "School‐based interventions for reducing disciplinary school exclusion: a systematic review," Campbell Systematic Reviews, John Wiley & Sons, vol. 14(1), pages -216.
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    15. James Lewis & Sarah Marsden & Adrian Cherney & Martine Zeuthen & Jocelyn J. Bélanger & Anastasiia Zubareva & Jürgen Brandsch & Mauro Lubrano, 2023. "PROTOCOL: Case management interventions seeking to counter radicalisation to violence: A systematic review of tools and approaches," Campbell Systematic Reviews, John Wiley & Sons, vol. 19(1), March.
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