The goal of the Violent Extremism Lab is to understand the psychology that leads to self-sacrificial violence - whether in the form of suicide terrorism or the high-risk strategies of dictators that may lead to their own demise but only after many others have been brutally killed. There is growing evidence that such behaviour is often motivated by identity fusion - an extreme form of social cohesion whereby an individual's personal identity becomes fused with that of the group. Highly fused individuals will stop at nothing to defend the group when it is imperiled. Our violence risk assessment research can help understand psychological indicators of proneness to violent action before the signs of a planned intervention become visible in operational or military activities. An important advantage of our framework is that it can be applied to state and non-state actors in different demographic, economic, cultural and religious contexts. As the relevant variables are revealed unconsciously in speech, they also reach beyond strategically chosen words of escalation or de-escalation and promise to provide a more reliable predictor than explicit threats to violence.
Key Questions
Funded by an Advanced Grant from the European Research Council as well as a PhD studentship from the UK's Economic and Social Research Council and St John's College, our lab group has been busy analysing the language and narratives used by violent extremists with the aim of improving detection and prevention practices in the field of counterterrorism. Security and intelligence services, as well as social media companies, have long been trying to gain a better understanding of the communication patterns that distinguish violent extremist and terrorists from those who merely express extremist beliefs but present no real threat. Our award-winning research takes these efforts to a new level. Our research is based on the fusion-plus-threat model which integrates previous empirical findings on group alignment and identity, psychological kinship, and parochial altruism to form a theory that makes specific predictions about the role of in-group identity fusion and out-group threat perception as drivers of violent extremism.
Funded by the Calleva Research Centre for Evolution and Human Science at Magdalen College, Oxford – with additional support from The British Academy and the Airey Neave Trust – our lab group is now also investigating the role of the fusion-plus-threat model in explaining the seemingly irrational behaviours of heads of state who engage in extreme forms of violence against their own populations or go to war when the costs seem to outweigh the benefits. For example, prior to the visible changes in Russia's military activities in 2021, most experts would have considered a Kremlin-led aggression war in Ukraine an unlikely scenario. Like Vladimir Putin, the willingness of many leaders to translate hawkish words into action has proven hard to predict. How seriously should we take Kim Jong-un's aggressive threats? How dangerous are countries led by ideologically extreme figures such as Iran under Ebrahim Raisi or Afghanistan under the Taliban? What about Erdogan or Min Aung HIaing who both have a history of violence against their own populations? And most importantly, might there be an underestimated threat emerging in countries that are currently not on the radar of the diplomatic, defence and intelligence communities?
Events
Outputs
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Ebner, J., Whitehouse, H. (2026). Mapping Threats from Terrorists and Tyrants. The British Academy. -
Busher, J., Ebner, J., Harris, G., Hacsek, Z., & Macklin, G. (In Print). The relational dynamics of violence escalation and inhibition during far-right protest waves. American Behavioural Scientist.
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Kristinsdottir, K., Freestone, M., Underwood, A., & Ebner, J. (2025). Pathological fixation on shared beliefs: A review and bibliometric analysis of extreme, overvalued and delusion-like beliefs. Frontiers in Psychiatry.
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Lopez-Buarque, Kingdon, Czerwinsky, Ebner et al. (2025). Written evidence for Combating New Forms of Extremism. United Kingdom Parliament Home Affairs Committee.
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Buhrmester, M., Swann Jr., W., McQuinn, B., Everington, A., Hafid, L., and Whitehouse, H. (2025). Examining Shifts in Group-Based Motivations for Civil Conflicts in Libya. New England Journal of Public Policy, 37.
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Lestari, M. D., Putra, I. E., Kavanagh, C., Muzzulini, B., Swandi, N. L. I. D., Harumi, B. P. Y., Whitehouse, H. (2025). Bali Bombing's memories and past traumatic events among Balinese. Peace and Conflict: Journal of Peace Psychology.
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Stojanov, A., Fridberg, D., Ebner, J, Whitehouse, H. & Halberstadt, J. (2025). Conspiracy, Control, and Extremism: A Psychological Examination of Radical Behaviour, American Psychological Association. To be published
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Kristinsdottir, K., Ebner, J., Whitehouse, H. (2025). Extreme overvalued beliefs and identities: revisiting the drivers of violent extremism. Frontiers in Psychology, 16.
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Ebner, J., Whitehouse, H. (2023). Identity and Extremism: Sorting out the causal pathways to radicalization and violent self-sacrifice. The Routledge Handbook on Radicalization and Countering Radicalization. Abingdon: Routledge.
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Ebner, J., Kavanagh, C., Whitehouse, H. (2023). Assessing Violence Risk among Far-Right Extremists: A New Role for Natural Language Processing, Terrorism and Political Violence.
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Ebner, J., Kavanagh, C., Whitehouse, H. (2023). Measuring socio-psychological drivers of extreme violence in online terrorist manifestos: an alternative linguistic risk assessment model. Journal of Policing, Intelligence and Counter Terrorism, 19(2), 125–143.
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Ebner, J., Kavanagh, C., Whitehouse, H. (2022). The QAnon Security Threat: A Linguistic Fusion-Based Violence Risk Assessment, Perspectives on Terrorism, Special Issue on Anti-Government Extremism, 16(6): 62–86.
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Ebner, J., Kavanagh, C., Whitehouse, H. (2022). Is There a Language of Terrorists? A Comparative Manifesto Analysis. Studies in Conflict & Terrorism, 1–27.
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Whitehouse, H. (2019). Terrorism: The Dark Side To Group Love. Interactions, 1(4).
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Whitehouse H. (2018) Dying for the group: Towards a general theory of extreme self-sacrifice, Behavioral and Brain Sciences, 41: e192