Browsing by Author "Lee, Jaemin"
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Item Open Access Exposure to opposing views on social media can increase political polarization.(Proceedings of the National Academy of Sciences of the United States of America, 2018-09) Bail, Christopher A; Argyle, Lisa P; Brown, Taylor W; Bumpus, John P; Chen, Haohan; Hunzaker, MB Fallin; Lee, Jaemin; Mann, Marcus; Merhout, Friedolin; Volfovsky, AlexanderThere is mounting concern that social media sites contribute to political polarization by creating "echo chambers" that insulate people from opposing views about current events. We surveyed a large sample of Democrats and Republicans who visit Twitter at least three times each week about a range of social policy issues. One week later, we randomly assigned respondents to a treatment condition in which they were offered financial incentives to follow a Twitter bot for 1 month that exposed them to messages from those with opposing political ideologies (e.g., elected officials, opinion leaders, media organizations, and nonprofit groups). Respondents were resurveyed at the end of the month to measure the effect of this treatment, and at regular intervals throughout the study period to monitor treatment compliance. We find that Republicans who followed a liberal Twitter bot became substantially more conservative posttreatment. Democrats exhibited slight increases in liberal attitudes after following a conservative Twitter bot, although these effects are not statistically significant. Notwithstanding important limitations of our study, these findings have significant implications for the interdisciplinary literature on political polarization and the emerging field of computational social science.Item Open Access Structural Constraints in Intergroup Relations: A Contextual Approach to Polarization and Conflict in Social Networks(2018) Lee, JaeminSocial network analysis is a powerful tool to describe and explain the dynamics of intergroup relations. Research using political and school networks illuminates the micro assortative mechanisms of social ties that directly contribute to the emergence of macro intergroup outcomes such as polarization and conflict. Yet these studies have not fully explored the ecological insights arising from considering how structural constraints—i.e., demographic distributions and emerging meso-group structures—contextualize tie formation, and thereby produce variation in macro intergroup outcomes. This dissertation examines the impact of higher-level constraints on tie formation and intergroup relations in the two contexts: political polarization in America and enmity formation in Adolescence. Studies 1 and 2 ask where the remarkably high level of political homophily comes from and how such relational antecedents affect opinion polarization. Drawing on macrosociological theory of network formation, I use agent-based modeling and the data from the American National Election Surveys to show the pivotal role that sociodemographic consolidation—the correlation between social positions across multiple dimensions—plays in the rise of political homophily in networks and the amplification of the echo chamber effects. Study 3 asks whether racial segregation is directly linked to conflict in schools. Constructing a unified model of friendship and enmity formation on network data collected in a racially diverse middle school, I find that the racial segregation-conflict link is not a direct one but complicated by status-group processes. Racial differences segregate friendships, but conflict is mainly triggered by the status demarcation between members and outsiders of “leading crowds” within racial groups. Combined, these three studies find that the contextual properties—consolidation and groups—condition the rates and effects of micro homophily that shape variation in intergroup conflict. In conclusion, I discuss how my contextual approach contributes to our understanding of intergroup relations in each of the substantive fields of study.