By  Vincenzo Bove,  Georgios Efthyvoulou,  and Harry Pickard

Numerous studies demonstrate that terrorism causes strong public reactions immediately after the attack, with important implications for democratic institutions and individual well-being. Yet, are these effects short-lived? We answer this question using a quasi-experimental design and data on three successful and three foiled terrorist attacks in the United Kingdom. We find that heightened risk perceptions and emotional reactions in the wake of successful attacks do not dissipate in the very short run but are sustained over time and up to 130 days after the attacks. We also find that, whereas large-scale attacks cause a long-lasting shift in risk assessments and emotions, the corresponding effect of smaller-scale terrorism incidents appears to subside within one month. Interestingly, foiled attacks can also affect public perceptions, which, however, quickly return to normal levels. We argue that the extent of media coverage is partly responsible for the duration of these effects.

United Kingdom: United Nations University World Institute for Development Economics Research, 2022, 19p.

By Jens F. Binder and Jonathan Kenyon

This work is concerned with the extent and magnitude of threat related to online radicalization in the context of terrorist acts and related offending. Online influences have been depicted as major drivers for the propagation and adoption of extremist ideologies, which often contain an element of collective grievance, and subsequent acts of violence. This is most pronounced in the discussion of so-called lone actor terrorism, but extends to all forms of extremist offending, and beyond. The present work situates online radicalization leading to terrorist acts within the wider context of grievance-based beliefs and attitudes. Further, it addresses current positions and debates surrounding the relevance and mechanisms of online radicalization in terrorist offending. Recent evidence from quantitative studies is reviewed to estimate prevalence of online radicalization and the level of threat that results from it. This is followed by a discussion of plausible, but opposing, interpretations of the estimates presented. While online radicalization does occur, with and without reference to offline processes, the resulting threat is not overly high. This assessment, however, refers to the present only and is unlikely to hold for the future, given the general growth and acceleration of online activity among terrorist actors

United Kingdom: Forensic and Legal Psychology, 2022, 10p.

By Jonathan Kenyon

The overarching aim of this doctoral research was to investigate the role of the Internet in radicalisation pathways and offending of convicted extremists in England and Wales. The empirical study was unique because it benefitted from access to closed source risk assessment reports within His Majesty’s Prison and Probation Service (HMPPS). These reports were authored by Psychologists and Probation Officers with access to restricted case documentation and in the majority of cases, direct interviews with the individuals concerned. Findings were based on 235 convicted extremists, all of whom were considered to have radicalised prior to committing their offence. Variables of interest, including offender demographics, offence characteristics and online activities were extracted from risk reports completed from October 2010 to December 2017. Since completion of the doctorate, the analysis has been expanded to 437 convicted extremists, which includes all those subject to risk reports from October 2010 to December 2021. This accounts for close to every convicted extremist in England and Wales considered to have radicalised prior to their conviction.

Scotland: Centre for Research and Evidence on Security Threats, 2023, 4p.

By Hanna Paalgard Munden, Sarah Marsden, MD Kamruzzaman Bhuiyan, Lotta Rahlf, Hanna Rigault Arkhis, Aimee Taylor

This report sets out the findings of research to understand the potential of the Good Lives Model (GLM) to interpret trajectories into and out of violent extremism and considers the implications for policy and practice. The Good Lives Model (GLM) is a well-developed manifestation of a strength-based approach to rehabilitation. The model argues that focusing on developing strengths and enhancing protections, rather than solely managing and controlling risk factors, offers a more fruitful route to preventing (re)offending. The GLM has become an increasingly prominent part of efforts to rehabilitate criminal offenders, however its potential with respect to the violent extremist population has not been fully exploited. This report is informed by a review of research on protective factors set out in an earlier report: Conceptualising Protective Factors: Strength-Based Approaches (Marsden and Lee, 2022) that established the theoretical foundation for the empirical research set out here.

Scotland: Centre for Research and Evidence on Security Threats, 2023, 30p.

By Rosamund Mutton, James Lewis, and Sarah Marsden

This guide sets out the evidence base for ‘online radicalisation’, examining how individual use of the Internet, in conjunction with offline influences, can facilitate radicalisation processes. The UK is the main context of concern, however comparable evidence is found in studies with samples from the USA, Canada, Belgium, Germany, Austria, and Israel. Radicalisation remains a contentious concept and few studies explicitly define ‘online radicalisation’. For the purposes of this guide, ‘radicalisation’ is understood as leading to cognitive outcomes reflected in changes in beliefs and ideas, and/or behavioural outcomes which manifest in changes in behaviour. Two systematic literature reviews (Hassan et al., 2018; Carthy et al., 2020) directed initial searches for relevant research. Further literature was identified through forward and backward citation searching, and narrower key word searches conducted in Google Scholar. Literature searches were completed between June and August 2022. The guide primarily examines literature published between January 2017 and July 2022. Although the evidence base remains modest in size, the research underpinning this guide is assessed to be good quality. There is a growing body of evidence that uses qualitative and quantitative methods to examine a range of factors which are relevant to online radicalisation.

Scotland: Centre for Research and Evidence on Security Threats, 2023, 42p.

By Joanna Dawson

This paper describes the recent history and present status of proscribed organisations under the Terrorism Act 2000 (the “2000 Act”). Prior to the 2000 Act, proscription was exclusively concerned with terrorism connected with the affairs of Northern Ireland. Under the 2000 Act, proscription was extended to include organisations concerned with both domestic and international terrorism. The Home Secretary may proscribe an organisation if they believe it is “concerned in terrorism”. If the Home Secretary believes that an organisation meets this statutory test, they must then decide whether to proscribe the organisation. In doing so, they must take into account various policy considerations. Consequences of proscription The 2000 Act sets out a number of proscription offences. These include belonging to or inviting support for a proscribed organisation; arranging or assisting with the arrangement of a meeting that supports a proscribed organisation; addressing such a meeting; or wearing clothing or displaying articles in public which arouse suspicion of membership or support of a proscribed organisation. It is also possible to impose financial sanctions on proscribed organisations.   Current proscribed organisations As of September 2023 there were 79 international terrorist groups proscribed under the Terrorism Act 2000 and 14 organisations in Northern Ireland proscribed under previous legislation. In November 2021 the Home Secretary announced that the Government had laid an instrument to proscribe Hamas in its entirety, ending the distinction between different wings of the organisation. In September 2023 the Government laid an instrument to proscribe Wagner Group, a private military organisation which has acted as a proxy for the Russian state. The Government considers it to involved in committing acts of terrorism, including in relation to its involvement in Russia’s invasion of Ukraine. The Annex to this paper includes a current list of proscribed organisations and a description of their activities. Criticisms of the proscription regime Proscription has been characterised as a powerful deterrent, a way of tackling lower-level support for terrorism, and a signal of rejection by society. But questions have also been raised as to its utility in combating terrorism and its compatibility with the rule of law. The former Independent Reviewer of Terrorism Legislation (IRTL), Lord David Anderson KC, repeatedly recommended the introduction of time limits for proscription orders, as have his successors, Max Hill QC and the current IPTL, Jonathan Hall KC. However, the Government has so far declined to follow these recommendations and currently deproscription is done by way of application only. As a consequence, groups that no longer meet the statutory requirements for proscription continue to be proscribed, a situation described by Lord Anderson as “an affront to the rule of law”.

London: UK Parliament, House of Commons Library, 2024, 70p.