Author: searri

Physical Review Letters

Online communities featuring “anti-X” hate and extremism, somehow thrive online despite moderator pressure. We present a first-principles theory of their dynamics, which accounts for the fact that the online population comprises diverse individuals and evolves in time. The resulting equation represents a novel generalization of nonlinear fluid physics and explains the observed behavior across scales. Its shockwavelike solutions explain how, why, and when such activity rises from “out-of-nowhere,” and show how it can be delayed, reshaped, and even prevented by adjusting the online collective chemistry. This theory and findings should also be applicable to anti-X activity in next-generation ecosystems featuring blockchain platforms and Metaverses.

Pedro Manrique, Frank Yingjie Huo, Sara El Oud, Minzhang Zheng, Lucia Illari, and Neil Johnson

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Oxford Academic

Disasters are fortunately uncommon events. Far more common are events that lead to societal crises, which are notable in their impact, but fall short of causing a disaster. Such near-miss events may be reimagined through stochastic modeling to be worse than they actually were. These are termed downward counterfactuals. A spectrum of reimagined events, covering both natural and man-made hazards, are considered. Included is a counterfactual version of the Middle East Respiratory Syndrome (MERS). Attention to this counterfactual coronavirus in 2015 would have prepared the world better for COVID-19.

Gordon Woo, Neil Johnson

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PLOS One

Online hate speech is a critical and worsening problem, with extremists using social media platforms to radicalize recruits and coordinate offline violent events. While much progress has been made in analyzing online hate speech, no study to date has classified multiple types of hate speech across both mainstream and fringe platforms. We conduct a supervised machine learning analysis of 7 types of online hate speech on 6 interconnected online platforms. We find that offline trigger events, such as protests and elections, are often followed by increases in types of online hate speech that bear seemingly little connection to the underlying event. This occurs on both mainstream and fringe platforms, despite moderation efforts, raising new research questions about the relationship between offline events and online speech, as well as implications for online content moderation.

Yonatan Lupu, Richard Sear, Nicolas Velásquez, Rhys Leahy, Nicholas Johnson Restrepo, Beth Goldberg, Neil Johnson

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