Category: Featured Database

Author: Winter, C., Neumann, P., Meleagrou-Hitchens, A., Ranstorp, M., Vidino, L., & Fürst, J. Description: This article reviews the academic literature on how and for what purposes violent extremists use the Internet, at both an individual and organizational level. After defining key concepts like extremism, cyber-terrorism and online radicalization, it provides an overview of the virtual extremist landscape, tracking its evolution from static websites and password-protected forums to mainstream social media and encrypted messaging apps. The reasons why violent extremist organizations use online tools are identified and evaluated, touching on…

Author: Johnson, N. F., Leahy, R., Restrepo, N. J., Velasquez, N., Zheng, M., Manrique, P., Devkota, P., & Wuchty, S. Description: Online hate and extremist narratives have been linked to abhorrent real-world events, including a current surge in hate crimes and an alarming increase in youth suicides that result from social media vitriol; inciting mass shootings such as the 2019 attack in Christchurch, stabbings and bombings; recruitment of extremists, including entrapment and sex-trafficking of girls as fighter brides; threats against public figures, including the 2019 verbal attack against an anti-Brexit…

Author: Costello, M., Barrett-Fox, R., Bernatzky, C., Hawdon, J., & Mendes, K. Description: Exposure to hate material is related to a host of negative outcomes. Young people might be especially vulnerable to the deleterious effects of such exposure. With that in mind, this article examines factors associated with the frequency that youth and young adults, ages 15 to 24, see material online that expresses negative views toward a social group. We use an online survey of individuals recruited from a demographically balanced sample of Americans for this project. Our analysis…

Author: Pauwels, L., & Schils, N. Description: The present study applies Social Learning (Differential Association) Theory to the explanation of political violence, focusing on exposure to extremist content through new social media (NSM) and controlling for key variables derived from rival theories. Data are gathered using (a) a paper-and-pencil study among high school students, and (b) a web survey targeting youths between 16 and 24 years old. A total of 6020 respondents form the dataset. Binary logistic regression is used to analyze the data. Results show that even when controlling…

Author: Hawdon, J., Bernatzky, C., & Costello, M. Description: The Internet’s relatively unfettered transmission of information risks exposing individuals to extremist content. Using online survey data (N = 768) of American youth and young adults, we examine factors that bring individuals into contact with online material advocating violence. Combining aspects of social structure-social learning theory with insights from routine activity theory, we find that exposure to violence-advocating materials is positively correlated with online behaviors, including the use of social media platforms and the virtual spaces individuals frequent. Target antagonism is…

Author: Hassan, G., Brouillette-Alarie, S., Alava, S., Frau-Meigs, D., Lavoie, L., Fetiu, A., Varela, W., Borokhovski, E., Venkatesh, V., Rousseau, C., & Sieckelinck, S. Description: The main objective of this systematic review is to synthesize the empirical evidence on how the Internet and social media may, or may not, constitute spaces for exchange that can be favorable to violent extremism. Of the 5,182 studies generated from the searches, 11 studies were eligible for inclusion in this review. We considered empirical studies with qualitative, quantitative, and mixed designs, but did not…

Author: Costello, M., Hawdon, J., Bernatzky, C., & Mendes, K. Description: Why do some people find online hate material more disturbing than others? We use a random sample of Americans between the ages 15 and 36 to address this question. Descriptive results indicate that a majority of respondents surveyed find online hate material very or extremely disturbing, while smaller shares find it moderately, slightly, or not at all disturbing. We utilize an ordinal logistic regression to explore factors associated with these varying perceptions of hate material. Results demonstrate that males…

Author: Costello, M., & Hawdon, J. Description: What are the factors associated with the production of online hate material? Past research has focused on attributes associated with seeing and being targeted by online hate material, but we know surprisingly little about the creators of such material. This study seeks to address this gap in the knowledge, using a random sample of Americans, aged 15–36. Descriptive results indicate that nearly one-fifth of our sample reported producing online material that others would likely interpret as hateful or degrading. We utilize a logistic…

Author: Costello, M., Hawdon, J., Ratliff, T., & Grantham, T. Description: Who is likely to view materials online maligning groups based on race, nationality, ethnicity, sexual orientation, gender, political views, immigration status, or religion? We use an online survey (N = 1034) of youth and young adults recruited from a demographically balanced sample of Americans to address this question. By studying demographic characteristics and online habits of individuals who are exposed to online extremist groups and their messaging, this study serves as a precursor to a larger research endeavor examining the online…

Author: Jin, Z., Ainsworth, E. A., Leakey, A. D. B., & Lobell, D. B. Description: Elevated atmospheric CO2 concentrations ([CO2 ]) are expected to increase C3 crop yield through the CO2 fertilization effect (CFE) by stimulating photosynthesis and by reducing stomatal conductance and transpiration. The latter effect is widely believed to lead to greater benefits in dry rather than wet conditions, although some recent experimental evidence challenges this view. Here we used a process-based crop model, the Agricultural Production Systems sIMulator (APSIM), to quantify the contemporary and future CFE on…