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Researchers are increasingly conducting research using primary source data involving observation of, and exposure to, violent extremist individuals, their acts, their online content, and the ideologies that they act in support of. Of concern is that this increased use of primary source material has not occurred alongside a serious investigation of the traumatic outcomes that may result from constant exposure to such materials within the process of conducting academic research. As such, the goal of this review is to conduct a rapid evidence assessment to identify (a) What theories currently exist that conceptualize trauma stemming from vicarious observation of extremist atrocities? (b) In what similar domains (if any) have researchers conceptualized the trauma that stems from vicarious observation of extremist atrocities? (c) What is the current evidence base for these theories? And (d) What are the immediate research needs to extend this research and support the research workforce? Articles were identified using search strings related to types of trauma, and relevant domains of work (e.g., criminal justice, healthcare, national security, content moderation). In total 34 articles were screened and assessed in full. The work domains of these articles ranged from drone warfare to digital forensics and interrogation interpreters. Overall, exposure to traumatic images, videos, and events is associated with burnout, secondary traumatic stress, turnover intentions, and a host of wider negative psychosocial outcomes. Furthermore, this process is impacted by several factors including the nature of the content, the wider organizational culture, and individual differences.

Increasingly, global society is focused on the harm caused by material accessed on the internet. Individuals of all ages and backgrounds–policy makers, academics, politicians, mental health professionals, medical professionals and the general public–are seeking to understand the processes that govern the relationship between exposure to harmful content online and later harmful cognitions and behaviors. Several commentators have placed into stark focus several questions surrounding the use (and misuse) of the internet, and prevention of harm from it. Three issues come immediately to mind: First, what can be done to prevent the manifestation of harmful activities stemming from being online? Second, what is the underlying relationship between harmful material accessed online, and harmful behavioral outcomes? And third, what is the best approach (and how to we know what the “best” is) to prevent the manifestation of harmful behavior stemming from harmful content online? Rather than looking at each of these issues as a stovepipe, and seeking to answer each in isolation, in this chapter we adopt an integrationist perspective on the issue of preventing online harm online. Specifically, we will look at the theories of how and why exposure to extreme and harmful material online can cause negative real-world outcomes. We focus on the innovative Google-led program Jigsaw, 1 to explore the many and varied approaches that can be adopted to challenge and counter the issues of extreme and harmful material online. Finally, leveraging new approaches from public health (Su et al., 2021; Shortland et al., 2021), we outline the major ethical, practical, and theoretical issues that pervade technology-based efforts to tackle the issue of extreme and harmful material online.

Objective: This paper applies Reinforcement Sensitivity Theory to explain the role of exposure to violent extremist content online in the wider psychological process of “radicalization.” Reinforcement Sensitivity Theory is a suitable theory to apply to this domain given that (a) the motivation to engage in violent extremism is widely discussed, yet motivational theories are rarely applied and (b) current risk factors for engagement in violent extremist behavior show a high degree of overlap with core Reinforcement Sensitivity Theory variables (e.g., impulsivity and social dominance). Method: This study uses an experimental design in which 479 participants from Amazon’s Mechanical Turk were randomly assigned one of two short vignettes (violent extremist/violent nonextremist) to frame the content of a social media-based behavioral task. The effect of exposure to violent extremist content online on intentions for political mobilization was measured via the Activism and Radicalism Intentions Scale. Results: While exposure to online violent extremist content did not increase tendencies for political mobilization, Behavioral Activation System traits were positively associated with the willingness to engage with violent extremist content online and with intentions for political mobilization. Conclusions: Behavioral Activation System traits provide a possible avenue to explain individual differences in the process of radicalization and the potential relevance of Reinforcement Sensitivity Theory for theories of radicalization provides further evidence that new knowledge that can be gleaned by applying established psychological theories to the study of radicalization.

VOX-Pol Blog post.

Online behaviour can provide a unique window from which we can glean intent. From an intelligence standpoint it provides an important source of open-source information. However, making inference of intent from online activity is inherently difficult. Yet elsewhere progress is being made in incorporating information online into decisions regarding risk and offender prioritisation. This chapter synthesises lessons learnt from studies of risk assessment of violent extremists, risk assessment online, and the form and function of extremist materials online in order to begin to approach the issue of online risk assessment of violent extremism. In doing so it highlights issues associated with the diversity of online extremist behaviour, the diversity of offline extremist behaviour and the general lack of understanding related to the interaction of online and offline experiences, and how this contributes to the wider psychological process of ‘radicalisation’. Implications for practitioners are discussed.

In recent years, Hezbollah has used social media to recruit Israeli Arabs and West Bank-based Palestinians to attack Israeli targets. A recent innovation in terrorist tactics has given rise to “virtual entrepreneurs,” which to date have been largely associated with the Islamic State’s online recruitment efforts. Hezbollah’s virtual planners, similar to those in the Islamic State, use social media to establish contact with potential recruits before transitioning to more encrypted communications platforms, transferring funds, and issuing instructions to form cells, conduct surveillance, and carry out terrorist attacks. Online recruitment presents a low-cost option that offers plausible deniability for Hezbollah. While every virtual plot led by Hezbollah that targeted Israel has been foiled thus far, Israeli authorities spend time and resources disrupting these schemes at the expense of other more pressing threats. By digitally recruiting Palestinians to attack Israel, Hezbollah and its patron Iran are seeking to cultivate a new front against Israel amid rising regional hostilities.