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Sebastián Valenzuela

@sebavalenz.bsky.social

450 followers 120 following 12 posts

Associate Professor in Communications at U Catolica de Chile | Researcher with IMFD and NUDOS | Chief Science Officer http://IPIE.info | Political communication, technology, journalism

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Sebastián Valenzuela is a Chilean academic and researcher specializing in political communication, journalism, and social media. He is a Professor at the School of Communications at the Pontifical Catholic University of Chile Pontifical Catholic University of Chile) and Chief Science Officer of the International Panel on the Information Environment International Panel on the Information Environment. Valenzuela's research has gained international recognition and has been featured in media outlets such as the BBC, The New Yorker, Time, and The Wall Street Journal. .. more

Communication & Media Studies 54%

Political science 20%

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Sebastián Valenzuela @sebavalenz.bsky.social · Mar 3

New from @milenionudos.bsky.social 📢

Using surveys from @reutersinstitute.bsky.social, we examine how large-scale disruptions like COVID-19 alter information repertoires.

TL;DR: Despite drastic changes to people's routines, news media use remained strikingly stable.

🔗 doi.org/10.1080/1461... (OA)

Figure shows title and abstract of the paper

Reposted by Sebastián Valenzuela

Jake Grumbach @jakemgrumbach.bsky.social · Nov 7

Just finished my first skim of this paper showing the effects of "copaganda." The paper is incredibly creative and rigorous--and more than that, it's just important.

ungated: t.co/5bzHCTdmR2

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Reposted by Sebastián Valenzuela

Sebastián Valenzuela @sebavalenz.bsky.social · Jan 14

🚨 Call for Papers🚨
Are you researching public opinion across countries & contexts? Submit to the Public Opinion Quarterly special issue I’m co-editing with Hernando Rojas & Ting Chen. Let's advance nuanced, cross-contextual insights! 🌍
📅 Deadline: May 18, 2025
🔗 CFP: academic.oup.com/poq/pages/ad...

Call for Submissions to Public Opinion Quarterly’s 2026 Special Issue

“Advancing Public Opinion Research Across Countries and Contexts” Submission Deadline: 18 May 2025

academic.oup.com

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Sebastián Valenzuela @sebavalenz.bsky.social · May 13

One week left to submit your paper to this SI of POQ. See 👇 for more information:

Sebastián Valenzuela @sebavalenz.bsky.social · Jan 14

Call for Submissions to Public Opinion Quarterly’s 2026 Special Issue

“Advancing Public Opinion Research Across Countries and Contexts” Submission Deadline: 18 May 2025

academic.oup.com

Reposted by Sebastián Valenzuela, Florian Keusch

Public Opinion Quarterly - POQ @poqjournal.bsky.social · Nov 3

POQ is now accepting submissions for its 2026 Special Issue “Advancing Public Opinion Research Across Countries and Contexts.”🧵

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Reposted by Sebastián Valenzuela

Edda Humprecht @eddahumprecht.bsky.social · Mar 24

💫 New Open Access Special Issue in IJPP!
Advancing the Study of Political Misinformation Across Countries and Platforms
The SI explores how misinfo spreads, is perceived & countered across political systems, info environments & platforms.
Read the intro: journals.sagepub.com/doi/10.1177/...

Advancing the Study of Political Misinformation Across Countries and Platforms—Introduction to the Special Issue - Edda Humprecht, Sebastián Valenzuela, Frank Esser, Edson Tandoc, 2025

The global spread of political misinformation poses serious challenges to democracies, eroding trust and distorting public discourse. However, research has larg...

journals.sagepub.com

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Sebastián Valenzuela @sebavalenz.bsky.social · Jan 7

Great opportunity for fielding a pre-post study on the spread of junk content on Meta platforms... oh, wait. We don't need such study. We know what will happen. Just look at Elon's X.

The New York Times @nytimes.com · Jan 7

Breaking News: Meta said it would end its fact-checking program and rely instead on Facebook and Instagram users to add notes or corrections to posts. The move is likely to please the incoming Trump administration and its conservative allies.

Meta Reveals Plan to Alter Fact-Checking Program

The move will end a third-party fact-checking system and rely on users to add notes or corrections to posts. It is likely to please the incoming Trump administration and its conservative allies.

www.nytimes.com

Reposted by Sebastián Valenzuela, Alexandra Juhasz, Sandra González‐Bailón

The New York Times @nytimes.com · Jan 7

Meta Reveals Plan to Alter Fact-Checking Program

The move will end a third-party fact-checking system and rely on users to add notes or corrections to posts. It is likely to please the incoming Trump administration and its conservative allies.

www.nytimes.com

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Reposted by Emily K. Vraga, Kai Sassenberg, Sebastián Valenzuela , and 2 more Emily K. Vraga, Kai Sassenberg, Sebastián Valenzuela, Xiaoli Nan, Jana Lasser

Sander van der Linden @profsanderlinden.bsky.social · Dec 16

In this new article in American Psychologist we respond to critics in detail and clarify two key points for the field;

(1) The prevalence of misinformation in society is substantial when properly defined.

(2) Misinformation causally impacts attitudes and behaviors.

psycnet.apa.org/fulltext/202...

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Sebastián Valenzuela @sebavalenz.bsky.social · Dec 19

Lots of food for thought in these essays. Please read, comment, and share.

APSA & ICA Political Communication Divisions @polcomm.bsky.social · Dec 18

✨Out now: The Fall Issue (Nr. 30) of the Political Communication Report!✨
“What does PolComm Stand for? Normative Dimensions of Political Communication Research & Theorizing”
📖 Full issue: politicalcommunication.org/issue/fall-2...

A 🧵 on the essays featured in this issue:

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Reposted by Dhavan V. Shah, Sabina Mihelj, Sebastián Valenzuela , and 3 more Dhavan V. Shah, Sabina Mihelj, Sebastián Valenzuela, Travis N. Ridout, Daniel Kreiss, Kevin Coe

APSA & ICA Political Communication Divisions @polcomm.bsky.social · Dec 18

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Sebastián Valenzuela @sebavalenz.bsky.social · Dec 17

The debate on whether misinformation matters is a good reminder that, in science, absence of evidence ≠ evidence of absence.

Sander van der Linden @profsanderlinden.bsky.social · Dec 16

Reposted by Sebastián Valenzuela, Kevin Coe, Shelley Boulianne

APSA & ICA Political Communication Divisions @polcomm.bsky.social · Dec 12

📣CALL FOR APPLICATIONS:
APSA & ICA's PolComm Divisions are looking for a new...
(1) Webmaster 💻 &
(2) Social Media Officer🤳!
⏳Deadline: Friday, 10 January 2025.
Full Call here:
politicalcommunication.org/wp-content/u...

politicalcommunication.org

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Sebastián Valenzuela @sebavalenz.bsky.social · Nov 23

Are you doing research on public opinion across countries and contexts? Then, consider submitting an article to the 2026 special issue of @poqjournal.bsky.social, that I'm guest editing with Hernando Rojas and Ting Chen.

Full CFP: s3-us-west-2.amazonaws.com/clarivate-sc...

Deadline: May 18, 2025.

Public Opinion Quarterly - POQ @poqjournal.bsky.social · Nov 3

POQ is now accepting submissions for its 2026 Special Issue “Advancing Public Opinion Research Across Countries and Contexts.”🧵

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Reposted by Sebastián Valenzuela

Sebastián Valenzuela @sebavalenz.bsky.social · Sep 23

Excited to share the results from the 2024 Expert Survey on the Global Information Environment tomorrow for #IPIE's #UNGA program.

🗓️9/24 | 🕰️8:30-1:00 |📍CUNY Elebash Hall

Join Safiya Noble, Phil Howard, Wendy Chun, and many others for an for insightful discussion.

www.ipie.info/news/ipie-tr...

Event Announcement - Trust and Resilience in the Global Information Environment: IPIE to Hold Expert Briefing during UN General Assembly

www.ipie.info

Reposted by Sebastián Valenzuela

Sebastián Valenzuela @sebavalenz.bsky.social · Sep 5

🌍 AI audits are critical because they help us understand whether AI systems are delivering the promised outcomes or causing unforeseen impacts. But the audit ecosystem is fragmented. This lit review is key to making sense of the different approaches.

Sebastián Valenzuela @sebavalenz.bsky.social · Sep 5

📢New ipie.info report 📢"Global Approaches to Auditing Artificial Intelligence: A Literature Review," the first publication from the IPIE’s Scientific Panel on Global Standards for AI Audits. Now available at: ipie.info/research/glo...

IPIE - International Panel on the Information Environment

The Global Source of Scientific Knowledge About The World's Information Environment. We provide the most actionable scientific knowledge about threats to the world’s information environment.

IPIE.info

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Reposted by Christian Pieter Hoffmann, Sebastián Valenzuela, Tobias Rothmund

Stephan Winter @stephanwinter.bsky.social · Nov 20

New Preprint: “(Don’t) Stop Believing”
Are conservatives generally more vulnerable to #misinformation?
Our new study suggests: Bias occurs on both sides – but in different forms (higher confirmation bias on the right, higher disconfirmation on the left). osf.io/84c36
Here's a thread ⏬

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Reposted by Sebastián Valenzuela

JMCQ @jmcquarterly.bsky.social · Feb 15

#𝗝𝗠𝗖𝗤_𝟭𝟬𝟬
Read what @sebavalenz.bsky.social, Ingrid Bachmann, Regina Lawrence & Homero Gil de Zúñiga had to say about empirical articles revolving around politics and media published by JMCQ in its 100 years. This article is part of our 𝗖𝗲𝗻𝘁𝗲𝗻𝗻𝗶𝗮𝗹 𝗦𝗽𝗲𝗰𝗶𝗮𝗹 𝗜𝘀𝘀𝘂𝗲! journals.sagepub.com/doi/full/10....

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Sebastián Valenzuela @sebavalenz.bsky.social · Dec 20

Very happy to see that @jmcquarterly.bsky.social's centennial issue is finally out, journals.sagepub.com/toc/JMQ/curr... Delighted to have contributed with a piece on 100 years of polcomm in JMCQ: doi.org/10.1177/1077... Congratulations to all the editors, reviewers and authors

Sebastián Valenzuela @sebavalenz.bsky.social · Nov 8

Awesome design, yes. Important findings, too. Just impressed that not a single article from communication sciences is cited. Whole theories in comm, most notably cultivation, predict a causal-effect relationship between crime TV shows and crime attitudes and behavior. #academicsilos

Jake Grumbach @jakemgrumbach.bsky.social · Nov 7

Just finished my first skim of this paper showing the effects of "copaganda." The paper is incredibly creative and rigorous--and more than that, it's just important.

ungated: t.co/5bzHCTdmR2