About

Tim Groeling is a professor in the Department of Communication at UCLA. His research and teaching focus on the areas of Political Communication and New Media. He has received awards including a Goldsmith Book Prize from Harvard’s Shorenstein Center and a Bruce E. Gronbeck Political Communication Research Award from the National Communication Association. His work includes a commercial project that has been recognized as award-winning. For further information, his contact details are available at UCLA, including his office location in Rolfe Hall, Room 2322 & 2319, and his email address groeling@ucla.edu.

Research topics

• Computer Science
• Political Science
• Psychology
• Virology
• World Wide Web
• Data science
• Public administration
• Mechanical engineering
• Medicine
• Engineering
• Law

Selected publications

• Creativity with strategy: using project-based learning and campaign ads when teaching political communication

  Edward Elgar Publishing eBooks · 2026-02-12

  book-chapter1st authorCorresponding
  PublisherDOI

• Time is the fire in which message effects burn: Decay and sustenance of correction effects over time

  Journal of Communication · 2025-06-24 · 2 citations

  article

  Abstract The rapid dissemination of misinformation has raised concerns about its persistence despite corrective efforts, as the influence of fact-checking often diminishes quickly. This study explores “time” as a central theoretical and methodological construct in understanding the effects of fact-checking interventions. Across two large-scale, pre-registered panel experiments (N = 6,983), we examine the temporal dynamics of both the persuasive and unintended consequences of factual corrections. Results show that while fact-checks yield immediate belief updating, their effects largely fade within two weeks and do not produce durable belief echoes. In Study 2, we introduce a novel design treating time lag as an experimental treatment and show that simple interventions aimed at increasing the temporal accessibility of corrections—termed “accuracy reminders”—significantly extend the durability of their effects. These findings reconceptualize correction effects as inherently temporal processes, advancing communication theory and offering scalable, time-sensitive strategies for sustaining the influence of fact-checking in dynamic information environments.

  PublisherDOI

• Media bias

  Edward Elgar Publishing eBooks · 2025-12-16

  book-chapter1st authorCorresponding
  PublisherDOI

• FOREWORD

  Purdue University Press eBooks · 2022

  1st authorCorresponding
  • Computer Science
  • Computer Science
  PublisherDOI

• Mask images on Twitter increase during COVID-19 mandates, especially in Republican counties

  Scientific Reports · 2022 · 2 citations

  • Political Science
  • Computer Science
  • Political Science

  Wearing masks reduces the spread of COVID-19, but compliance with mask mandates varies across individuals, time, and space. Accurate and continuous measures of mask wearing, as well as other health-related behaviors, are important for public health policies. This article presents a novel approach to estimate mask wearing using geotagged Twitter image data from March through September, 2020 in the United States. We validate our measure using public opinion survey data and extend the analysis to investigate county-level differences in mask wearing. We find a strong association between mask mandates and mask wearing-an average increase of 20%. Moreover, this association is greatest in Republican-leaning counties. The findings have important implications for understanding how governmental policies shape and monitor citizen responses to public health crises.

  PublisherOA PDFDOI

• Mask Mandates Work, Especially in Republican Counties

  SSRN Electronic Journal · 2021

  • Political Science
  • Political Science
  • Public administration
  PublisherDOI

• War Stories: the Causes and Consequences of Public Views of War

  The SHAFR Guide Online · 2017-10-02 · 111 citations

  datasetSenior author

  List of Figures ix List of Tables xiii Preface xv Acknowledgments xvii Chapter One: News, Opinion, and Foreign Policy 1 Chapter Two: Politics across the Water's Edge 17 Chapter Three: Elite Rhetoric, Media Coverage, and Rallying'Round the Flag 46 Chapter Four: War Meets the Press: Strategic Media Bias and Elite Foreign Policy Evaluations 89 Chapter Five: Shot by the Messenger: An Experimental Examination of the Effects of Party Cues on Public Opinion Regarding National Security and War 114 Chapter Six: Tidings of Battle: Polarizing Media and Public Support for the Iraq War 149 Chapter Seven: Asserted Itself: The Elasticity of Reality and the War in Iraq 186 Chapter Eight: Barbarians inside the Gates: Partisan New Media and the Polarization of American Political Discourse 230 Chapter Nine: Back to the Future: Foreign Policy in the Second Era of the Partisan Press 284 References 297 Index 315

  PublisherDOI

• WHAT CAN THE PUBLIC LEARN BY WATCHING CONGRESS?

  Purdue University Press eBooks · 2016-11-15

  book-chapter1st authorCorresponding
  PublisherDOI

• Book Review: <i>In-Your-Face-Politics: The Consequences of Uncivil Media</i> MutzDiana C.In-Your-Face-Politics: The Consequences of Uncivil Media. Princeton: Princeton University Press, 2015.263pp. ISBN: 978-0-691-16511-0

  The International Journal of Press/Politics · 2016-09-14

  article1st authorCorresponding
  PublisherDOI

• Partisan News Before Fox: Newspaper Partisanship and Partisan Polarization, 1881-1972

  RePEc: Research Papers in Economics · 2013-01-01 · 1 citations

  preprint1st authorCorresponding

  How do partisan media affect polarization and partisanship? The rise of Fox News, MSNBC, and hyper-partisan outlets online gives this question fresh salience, but in this paper, we argue that the question is actually not new: prior to the broadcast era, newspapers dominated American mass communication. Many of these were identified as supporting one party over the other in their news coverage. While scholars have studied the composition and impact of the partisan press during their 19th-century height, the political impact of the gradual decline of these partisan papers remains relatively under-examined. The unnoted vitality and endurance of partisan newspapers (which constituted a majority of American newspapers until the 1960s) represents a huge hole in our understanding of how parties communicate. As a consequence of this omission, scholars have ignored a potentially vital contributing factor to changing patterns of partisan voting. In this paper, we examine both the degree and influence of partisanship in historical newspapers. We begin by content analyzing news coverage in the Los Angeles Times from 1885-1986 and the Atlanta Constitution from 1869-1945. To avoid problems of selection bias and the absence of a neutral baseline of coverage in the coded news, we focus on a subset of partisan news for which we have access to neutral coverage of a full population of potential stories: the obituaries of U.S. Senators. By coding whether and how the papers covered the deaths of these partisans over time, we are able to systematically test for bias. We then collect information on newspaper editorial stances from Editor and Publisher's Annual Yearbook to examine the impact of newspaper partisanship on voting patterns in presidential elections from 1932-92. Specifically, we test whether the proportion of partisan news outlets in a given media market explains changes in the rate of polarized voting.

  Publisher

Frequent coauthors

• Matthew A. Baum

  18 shared

• Jun Luo

  Guangzhou Vocational College of Science and Technology

  2 shared

• ZACHARY STEINERT-THRELKELD

  University of California, Los Angeles

  2 shared

• Jungseock Joo

  Nvidia (United States)

  2 shared

• Georgia Kernell

  University of California, Los Angeles

  2 shared

• Xiaofeng Lin

  University of California, Los Angeles

  2 shared

• Madeline Studebaker

  University of Arkansas at Fayetteville

  1 shared

• Cherie D. Maestas

  Purdue University West Lafayette

  1 shared

Labs

• UCLA Advertising and Marketing TeamPI

Awards & honors

• The Goldsmith Book Prize
• The Bruce E. Gronbeck Political Communication Research Award