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Kyu Sup Hahn

Seoul National University · 社会科学

研究室紹介

Professor Kyu Sup Hahn's research lab focuses on political communication, media effects, and public opinion, with a particular emphasis on how media consumption patterns shape political attitudes and civic engagement. The lab investigates ideological selectivity in media use, the role of issue importance in information exposure, and the impact of media system structures—such as public service versus market-based models—on political awareness. It also explores cross-national attitudes toward immigration, examining how economic and cultural factors influence public perceptions of immigrants across diverse democratic contexts.

political communicationmedia effectspublic opinionimmigration attitudesmedia systems

Research Overview

Papers
112
Total Citations
3,605
Papers (5y)
9
Primary Field
社会科学

Research Output Trend

Figures are computed from collected data and may differ slightly.

Publications per year (5y)
9total
2021
2022
2023
2024
2025
Citations per year (5y)
34total
20212022202320242025

Selected Papers

15
1
Article|1,939 citations·2009
Red Media, Blue Media: Evidence of Ideological Selectivity in Media Use
Shanto Iyengar, Kyu S. Hahn
SJR Q1Journal of Communication

We show that the demand for news varies with the perceived affinity of the news organization to the consumer’s political preferences. In an experimental setting, conservatives and Republicans preferred to read news reports attributed to Fox News and to avoid news from CNN and NPR. Democrats and liberals exhibited exactly the opposite syndrome—dividing their attention equally between CNN and NPR, but avoiding Fox News. This pattern of selective exposure based on partisan affinity held not only fo

CommunicationSocial Sciences
2
Article|338 citations·2008
Selective Exposure to Campaign Communication: The Role of Anticipated Agreement and Issue Public Membership
Shanto Iyengar, Kyu S. Hahn, Jon A. Krosnick, John Walker
SJR Q1The Journal of Politics

This article explores two hypotheses about how voters encounter information during campaigns. According to the anticipated agreement hypothesis, people prefer to hear about candidates with whom they expect to agree. The “issue publics” hypothesis posits that voters choose to encounter information on issues they consider most important personally. We tested both hypotheses by distributing a multimedia CD offering extensive information about George W. Bush and Al Gore to a representative sample of

CommunicationSocial Sciences
3
Article|298 citations·2004
Consumer Demand for Election News: The Horserace Sells
Shanto Iyengar, Helmut Norpoth, Kyu S. Hahn
SJR Q1The Journal of Politics

Reports on the state of the horserace and analysis of the candidates' strategies are pervasive themes in news coverage of campaigns. Various explanations have been suggested for the dominance of strategy-oriented news over hard news. The most frequently identified factors are the length of the modern campaign, the built-in conflict between journalists and campaign operatives, and the pressures of the marketplace. This article provides a test of the market hypothesis. Given access to a wide varie

Economics and EconometricsEconomics, Econometrics and Finance
4
Article|234 citations·2017
Economic and Cultural Drivers of Immigrant Support Worldwide
Nicholas A. Valentino, Stuart Soroka, Shanto Iyengar, Toril Aalberg, Raymond Duch, Marta Fraile, Kyu S. Hahn, Kasper Møller Hansen, Allison Harell, Marc Helbling, Simon Jackman, Tetsuro Kobayashi
SJR Q1British Journal of Political ScienceOA

Employing a comparative experimental design drawing on over 18,000 interviews across eleven countries on four continents, this article revisits the discussion about the economic and cultural drivers of attitudes towards immigrants in advanced democracies. Experiments manipulate the occupational status, skin tone and national origin of immigrants in short vignettes. The results are most consistent with a Sociotropic Economic Threat thesis: In all countries, higher-skilled immigrants are preferred

Sociology and Political ScienceSocial Sciences
5
Article|175 citations·2010
Cross‐National versus Individual‐Level Differences in Political Information: A Media Systems Perspective
Shanto Iyengar, James Curran, Anker Brink Lund, Inka Salovaara‐Moring, Kyu S. Hahn, Sharon Coen
SJR Q1Journal of Elections Public Opinion and PartiesOA

Abstract We propose a context‐dependent approach to the study of political information. Combining a content analysis of broadcast news with a national survey measuring public awareness of various events, issues, and individuals in the news, we show that properties of national media systems influence both the supply of news and citizens’ awareness of events in the news. Public service‐oriented media systems deliver hard news more frequently than market‐based systems. It follows that for citizens

CommunicationSocial Sciences
6
Article|143 citations·2013
Do Attitudes about Immigration Predict Willingness to Admit Individual Immigrants?
Shanto Iyengar, Simon Jackman, Solomon Messing, Nicholas A. Valentino, Toril Aalberg, Raymond Duch, Kyu S. Hahn, Stuart Soroka, Allison Harell, Tetsuro Kobayashi
SJR Q1Public Opinion Quarterly

Journal Article Do Attitudes about Immigration Predict Willingness to Admit Individual Immigrants? A Cross-National Test of the Person-Positivity Bias Get access Shanto Iyengar, Shanto Iyengar * Shanto Iyengar is the Harry and Norman Chandler Professor of Communication at Stanford University, Stanford, CA, USA. Simon Jackman is a Professor in the Department of Political Science at Stanford University, Stanford, CA, USA. Solomon Messing is a PhD candidate in the Department of Communication at Sta

Sociology and Political ScienceSocial Sciences
7
Article|82 citations·2009
“Dark Areas of Ignorance” Revisited
Shanto Iyengar, Kyu S. Hahn, Heinz Bonfadelli, Mirko Marr
SJR Q1Communication Research

This study tests the hypothesis that cross-national differences in public awareness of international affairs are attributable to differences in the supply of international news and citizens' demand for information. Simultaneously, the authors compared the level of news coverage accorded specific “target” subjects in major Swiss and U.S. news organizations and the level of attentiveness to news among Swiss and U.S. citizens. The authors' results revealed that Swiss media provided more hard intern

CommunicationSocial Sciences
8
Article|45 citations·2015
Fragmentation in the Twitter Following of News Outlets
Kyu S. Hahn, Seung‐Jin Ryu, Sungjin Park
SJR Q1Journalism & Mass Communication Quarterly

In recent years, Twitter emerged as an important news driver as most major news organizations now provide newsfeeds via Twitter. We classified 34 South Korean news outlets based on the pattern of co-following among 709,586 Twitter users. We also had a rare opportunity to match their following behavior with individual-level attributes by relying on supplementary survey data on 1,811 members of an online survey panel. Our results reveal that partisan and generational selectivity sharply polarizes

CommunicationSocial Sciences
9
Article|33 citations·2014
Who Deserves Citizenship? An Experimental Study of Japanese Attitudes Toward Immigrant Workers
Tetsuro Kobayashi, Christian Collet, Shanto Iyengar, Kyu S. Hahn
SJR Q3Social Science Japan JournalOA

Citizenship eligibility has emerged as a salient issue in Japan as population diversity has increased and the political system has aligned around debates over regional security and tabunka kyōsei (‘multicultural co-existence’). A predominantly Western literature suggests that sentiments toward immigrants are driven by economic self-interest and/or cultural identity. Such approaches, we argue, privilege groups as units of analysis when it is the personal attributes of immigrants that have a beari

Sociology and Political ScienceSocial Sciences
10
Article|30 citations·2022
Deliberative Distortions? Homogenization, Polarization, and Domination in Small Group Discussions
Robert C. Luskin, Gaurav Sood, James S. Fishkin, Kyu S. Hahn
SJR Q1British Journal of Political ScienceOA

Abstract Deliberation is widely believed to enhance democracy by helping to refine the ‘public will’, moving its participants' policy attitudes closer to their ‘full-consideration’ policy attitudes – those they would hypothetically hold with unlimited information, to which they gave unlimited reflection. Yet there have also been claims that the social dynamics involved generally ‘homogenize’ attitudes (decreasing their variance), ‘polarize’ them (moving their means toward the nearer extreme), or

CommunicationSocial Sciences
11
Article|24 citations·2007
Natural Disasters in Black and White: How Racial Cues Influenced Public Response to Hurricane Katrina
Shanto Iyengar, Kyu S. Hahn

This paper extends findings on implicit racial bias to public opinion concerning natural disasters. Using an online experiment, we show that racial cues embedded in news coverage of Hurricane Katrina influenced public support for governmental disaster assistance. First, exposure to a white rather than African-American hurricane victim made participants more likely to cite the federal government than private relief organizations or individual victims as the appropriate source of assistance. Secon

Sociology and Political ScienceSocial Sciences
12
Article|18 citations·2015
Quantifying Discrepancies in Opinion Spectra from Online and Offline Networks
Deok‐Sun Lee, Kyu S. Hahn, Soon‐Hyung Yook, Juyong Park
SJR Q1PLoS ONEOA

Online social media such as Twitter are widely used for mining public opinions and sentiments on various issues and topics. The sheer volume of the data generated and the eager adoption by the online-savvy public are helping to raise the profile of online media as a convenient source of news and public opinions on social and political issues as well. Due to the uncontrollable biases in the population who heavily use the media, however, it is often difficult to measure how accurately the online s

Statistical and Nonlinear PhysicsPhysics and Astronomy
13
Article|13 citations·2017
The Influence of “Social Viewing” on Televised Debate Viewers’ Political Judgment
Kyu S. Hahn, Hye-Yon Lee, Seyong Ha, Seulgi Jang, Joonwhan Lee
SJR Q1Political Communication

Social media could serve as an easy and fast window to the climate of public opinion. In the current study, we examined the influence of perceived opinion climate revealed via Twitter postings in shaping televised debate viewers’ candidate evaluation. We conducted two Web-based experiments in the high- and low-stimulus elections: (a) the 2012 Korean presidential election and (b) the 2014 Seoul mayoral election. Instead of using contrived stimulus materials, we were able to examine the influence

CommunicationSocial Sciences
14
Article|7 citations·2017
Partisan selective following on twitter over time: polarization or depolarization?
Hyelim Lee, Kyu S. Hahn
SJR Q1Asian Journal of Communication

In this study, we track the severity of partisan polarization in the following of legislators on Twitter during the initial two years of Twitter's introduction to South Korea. We examine the pattern of co-following among Twitter users following members of the 18th Korean National Assembly at three time points. We collected a complete list of all followers for each legislator and constructed their co-following network. We also supplemented our following data with survey data. This allowed us to m

CommunicationSocial Sciences
15
Article|3 citations·2013
A Test of Representativeness and Polarization in Twitter Followership: A Cross-national Assessment of Legislators’ Twitter Followers in the U.S. and South Korea
Kyu S. Hahn, Juyong Park, 이덕재, Hye Lim Lee
Journal of Cybercommunication Academic Society
CommunicationSocial Sciences

Research Areas

CommunicationSociology and Political ScienceStatistical and Nonlinear PhysicsAerospace EngineeringEconomics and EconometricsStatistics and Probability

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