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Many researchers, practitioners, and policymakers are concerned about online communities that are known to facilitate violent right-wing extremism, but little is empirically known about these digital spaces in general and the developmental posting behaviors that make up these spaces in particular. In this study, group-based trajectory modeling—derived from a criminal career paradigm—was used to identify posting trajectories found in the open-access sections of the Iron March and Fascist Forge forums, both of which have gained notoriety for their members’ online advocacy of violence and acts of violence carried out by them. Multinomial logistic regression and analysis of variance were then used to assess whether posters’ time of entry into the violent forums predicted trajectory group assignment. Overall, the results highlight a number of similarities and differences in posting behaviors within and across platforms, many of which may inform future risk factor frameworks used by law enforcement and intelligence agencies to identify credible threats online. We conclude with a discussion of the implications of this analysis, followed by a discussion of study limitations and avenues for future research.

VOX-Pol Blog Post.

Objectives
Despite popular notions of “filter bubbles” and “echo chambers” contributing to radicalization, little evidence exists to support these hypotheses. However, social structure social learning theory would suggest a hereto untested interaction effect.
Methodology
An RCT of new Twitter users in which participants were randomly assigned to a treatment of “filter bubble” (personalization algorithm) suppression. Ego-centric network and survey data were combined to test the effects on justification for suicide bombings.
Findings
Statistically significant interaction effects were found for two proxies of the echo chamber, the E-I index and modularity. For the treatment group, higher scores on both factors decreased the likelihood for radicalization, with opposing trends in the control group.
Conclusions
The echo chamber effect may be dependent on the filter bubble. More research is needed on online network structures in radicalization. While personalization algorithms can potentially be harmful, they may also be leveraged to facilitate interventions.

Over the last decade, there has been an increased focus among researchers on the role of the Internet among actors and groups across the political and ideological spectrum. There has been particular emphasis on the ways that far-right extremists utilize forums and social media to express ideological beliefs through sites affiliated with real-world extremist groups and unaffiliated websites. The majority of research has used qualitative assessments or quantitative analyses of keywords to assess the extent of specific messages. Few have considered the breadth of extremist ideologies expressed among participants so as to quantify the proportion of beliefs espoused by participants. This study addressed this gap in the literature through a content analysis of over 18,000 posts from eight far-right extremist forums operating online. The findings demonstrated that the most prevalent ideological sentiments expressed in users’ posts involved anti-minority comments, though they represent a small proportion of all posts made in the sample. Additionally, users expressed associations to far-right extremist ideologies through their usernames, signatures, and images associated with their accounts. The implications of this analysis for policy and practice to disrupt extremist movements were discussed in detail.

The growth of the online ‘manosphere’ has raised significant concerns regarding the movement’s highly misogynistic discourses and related lone offender attacks perpetrated by incels. This article employs a digital ethnography approach to examine r/IncelExit and r/ExRedPill, two forums dedicated to assisting individuals leave the manosphere. Utilizing a gendered perspective, this study delves into narratives from these forums to engage with theoretical debates on the conceptual need to recognize masculine agency. Key focus areas include exploring the radicalization and deradicalization processes, along with examination of narratives from individuals who use these subreddits to divert from joining the manosphere.

Blogs, social media, and search engines have democratized information seekers and providers. However, the same affordances of the Internet have also contributed to resurgence and transformation of far-right and racist communities. Despite a growing number of studies of far-right communities, little attention has so far been paid to the mechanisms through which far-right and racist ideologies are presented to the wider public. This paper contributes to this field of research with a longitudinal study of Swedish anti-immigration activity on Twitter between 2010 and 2013. Results are placed in a larger context provided by additional data from blogs and related studies.