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Sacha Altay

@sachaltay.bsky.social
6K followers 295 following 127 posts

🔎 Misinformation, social media & the news 🗞️ 🇨🇭 Postdoc at the University of Zurich, previously Reuters Institute & ENS 🇫🇷 sachaaltay.github.io

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Sacha Altay @sachaltay.bsky.social · 22/09/2026
With Claude I did a systematic literature review of misinformation prevalence, exposure, and concentration. There is a companion website that allows you to play with the data and signal me if an estimate is wrong or missing: altay-research.github.io/misinfo-prev...
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Antoine Marie PhD @a-marie-sci.bsky.social · 16/09/2026
𝐋𝐞𝐬 𝐋𝐋𝐌𝐬 𝐜𝐨𝐦𝐦𝐞 𝐚𝐭𝐨𝐮𝐭𝐬 𝐜𝐨𝐧𝐭𝐫𝐞 𝐥𝐚 𝐩𝐨𝐥𝐚𝐫𝐢𝐬𝐚𝐭𝐢𝐨𝐧 𝐞𝐭 𝐥𝐚 𝐦𝐞́𝐬𝐢𝐧𝐟𝐨𝐫𝐦𝐚𝐭𝐢𝐨𝐧 Vous avez toutes et tous en tête les inquiétudes légitimes sur les risques que posent les LLMs.
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Political Science Research and Methods @psrm.bsky.social · 04/09/2026
📰How should researchers debrief participants after exposing them to misinformation? ➡️ @emmahoes.bsky.social & @sachaltay.bsky.social show that specific debriefings with fact-checks reduce belief in false claims, while general warnings may increase skepticism toward true news doi.org/10.1017/psrm...
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Felix M. Simon @felixsimon.bsky.social · 02/09/2026
Back from my summer break with a piece for @transformernews.ai on why the impact of persuasive AI's will be smaller in the real world than some think because (1) it is hard to reach people and get their attention… buff.ly/TvWgFSH
transformernews.ai
AI is a worryingly-good persuader. But don’t panic, yet
AI systems are able to persuade people, but turning that ability into meaningful real-world influence may be harder
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Jay Van Bavel, PhD @jayvanbavel.bsky.social · 31/08/2026
I was asked to speak at a conference a couple of years ago. When I found out Ariely was also speaking I told the organizing I was pulling out. I can't understand how Duke University wants to continue to be associated with this. Thanks to Data Colada for this extremely hard detective work.
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Fabrizio Gilardi @fgilardi.bsky.social · 27/08/2026
I'm hiring! Three-year postdoc (80%) in my research group at @ipz.bsky.social, starting January 2027. Digital technology and politics, some teaching. Deadline: 30 September 2026. Questions welcome, and please share! www.ipz.uzh.ch/dam/jcr:bbee... (pdf)
Job ad, postdoc position
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Claire E. Robertson, PhD @crobertson500.bsky.social · 24/08/2026
Is social media truly making us more politically polarized, or does it simply over-represent our most extreme opinions? In our new preprint, @small-schulz.bsky.social and I present *punishing evidence* that social media systematically overrepresents users’ most extreme political opinions. 1/n
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Cambridge University Press Political Science & IR @cambup-polsci.cambridge.org · 10/08/2026
#OpenAccess from @psrm.bsky.social - Debriefings in misinformation research should include fact-checks to correct misperceptions and increase perceived learning - cup.org/4fOpX2Q - @emmahoes.bsky.social & @sachaltay.bsky.social #FirstView
Logo of Political Science Research and Methods featuring the initials "PS" and "RM" intertwined in an elegant white font on a black background.
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Sacha Altay @sachaltay.bsky.social · 22/06/2026
AI agents are valuable epistemic tools. They let us look under the hood of scientific research, lowering the cost of verifying (and implementing) good methodological practices. With @edgardubourg.bsky.social, we propose a step-by-step method for using them. osf.io/preprints/ps...
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Edgar Dubourg @edgardubourg.bsky.social · 23/06/2026
New paper with @sachaltay.bsky.social! A lot of people think AI can only make science worse. We argue agentic AI can actually be a great tool to do it better!
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Sacha Altay @sachaltay.bsky.social · 22/06/2026
AI agents are valuable epistemic tools. They let us look under the hood of scientific research, lowering the cost of verifying (and implementing) good methodological practices. With @edgardubourg.bsky.social, we propose a step-by-step method for using them. osf.io/preprints/ps...
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Saloni @scientificdiscovery.dev · 15/06/2026
My favourite piece of journalism on the social media ban was the wholesome story about the school that turned things around as students returned to gambling with cards again.
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Sacha Altay @sachaltay.bsky.social · 01/06/2026
Thanks to Claude I have a brand new website where you can scroll through my papers, talks, and podcasts, etc. Give it a look: sachaaltay.github.io :)
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Sacha Altay @sachaltay.bsky.social · 07/04/2026
One of my favorites paper got published 🤓 It covers a lot of ground and it’s the best summary of my views on misinformation and what to do about it. Give it a read :) 🔓 osf.io/preprints/ps... 👉 doi.org/10.1177/1461...
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Stephan Lewandowsky @lewan.uk · 09/04/2026
🧵 New report just dropped 🚨 "Fractured Reality: How Democracy Can Win the Global Struggle Over the Information Space" — from the EU Joint Research Centre, led by Mario Scharfbillig and I. A landmark read for anyone working on disinformation, platforms & democracy. 👇 1/10
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koenfucius @koenfucius.bsky.social · 08/04/2026
New paper by @sachaltay.bsky.social reframes the problem of misinformation, challenging common narratives and helping shape more appropriate, holistic solutions tackling the root causes rather than just salient symptoms: buff.ly/HbZEtJ1
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Sacha Altay @sachaltay.bsky.social · 07/04/2026
One of my favorites paper got published 🤓 It covers a lot of ground and it’s the best summary of my views on misinformation and what to do about it. Give it a read :) 🔓 osf.io/preprints/ps... 👉 doi.org/10.1177/1461...
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Matthew Facciani @matthewfacciani.bsky.social · 06/04/2026
A new paper by @sachaltay.bsky.social makes the case that fighting misinformation isn’t just about debunking, it’s about fixing the broader system: rebuilding trust, strengthening institutions, and expanding access to reliable information. I agree! journals.sagepub.com/doi/abs/10.1...
journals.sagepub.com
Sage Journals: Discover world-class research
Subscription and open access journals from Sage, the world's leading independent academic publisher.
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Felix M. Simon @felixsimon.bsky.social · 27/03/2026
Another example that makes me think people currently overindex on AI as a threat to elections and democracy while neglecting tried and tested threats to the same: vote buying, intimidation, and abuses of state power: buff.ly/ueWQbgJ
buff.ly
Orban's Hungarian government accused of mass voter intimidation ahead of election
A film quoting voters, mayors and a police officer alleges money and drugs are being offered to pressure people to back the ruling party.
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Sacha Altay @sachaltay.bsky.social · 24/03/2026
Fully agree! With @felixsimon.bsky.social we wrote "the proliferation of AI content may increase the value and demand for authentic content" knightcolumbia.org/content/dont...
knightcolumbia.org
Don’t Panic (Yet): Assessing the Evidence and Discourse Around Generative AI and Elections
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Seth Fletcher @sethfletcher.bsky.social · 17/03/2026
The widespread belief that kids today are uniquely unwell is weird, because as Melinda Wenner Moyer shows, they're less narcissistic & more empathetic & tolerant than previous gens; IQs are up; drug use, violence, teen pregnancies are down. The list goes on www.scientificamerican.com/article/the-...
scientificamerican.com
The kids are all right
Surprising studies show young people are doing better than previous generations in many ways
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Andrey Chetverikov @achetverikov.bsky.social · 04/03/2026
Recently, van der Stigchel and colleagues posted a provocative commentary suggesting that we should be wary of bots in online behavioral data collection (🧵by @cstrauch.bsky.social here: bsky.app/profile/cstr...). But should we? Here is my response letter osf.io/preprints/ps.... 1/5
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Brendan Nyhan @brendannyhan.bsky.social · 08/03/2026
The sky is not falling; high-quality platforms (Prolific, Verasight, CR Connect) have low rates of apparent bots. osf.io/preprints/ps... But also not zero; vigilance is very much needed!
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Sander van der Linden @profsanderlinden.bsky.social · 25/02/2026
Despite all the chatter, social media bans for teens lack evidence! New paper out in Nature Health. (1) Harms from social media are real & serious. (2) We need regulatory action but bans are not nuanced, do not empower youth, & are not supported by evidence. www.nature.com/articles/s44...
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Karsten Donnay @karstendonnay.bsky.social · 31/01/2026
🚨Job alert 🚨 I have an opening for a postdoc in my team at @ipz.bsky.social in the area of digital democracy starting Sep 1, 2026. If you are working on the impact of the digital transformation on politics, please apply by 🗓️ Mar 1, 2026. 📤 Please share widely! www.ipz.uzh.ch/de/ueber-uns...
ipz.uzh.ch
Offene Stellen / Open Positions
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Eli Stark-Elster @eselster.bsky.social · 29/01/2026
A vast array of data suggests that school, not social media, is the biggest modern threat to the mental health of children. If you were recently a child, that won’t be a surprise. If not: enjoy the post :) open.substack.com/pub/unpublis...
open.substack.com
School is Way Worse For Kids Than Social Media
On building a world that doesn’t make children want to die
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Kate Starbird @katestarbird.bsky.social · 26/01/2026
Yesterday, I awoke to news of another ICE killing in MN. On Bluesky, the conversation was deeply critical of ICE. But I wanted to see how things were going on X. Surprisingly, the attempts there to blame the victim weren't getting as much traction as I suspected. So I wrote a thing.
open.substack.com
Another Killing on ICE
The right wing propaganda machine can’t spin the killing of Alex Pretti
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Alberto Acerbi @acerbialberto.com · 24/01/2026
It seems like a good moment to re-share knightcolumbia.org/content/dont...
knightcolumbia.org
Don’t Panic (Yet): Assessing the Evidence and Discourse Around Generative AI and Elections
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Dan Williams @danwphilosophy.bsky.social · 24/01/2026
Henry Shevlin and I discuss "misinformation", propaganda, mass gullibility, advertising, social media, and deepfakes with the great Sacha Altay (@sachaltay.bsky.social). www.youtube.com/watch?v=_l5T...
youtube.com
AI Sessions #8: Misinformation, Social Media, and Deepfakes (with Sacha Altay)
YouTube video by Conspicuous Cognition
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Tom Costello @tomcostello.bsky.social · 20/01/2026
If you tell an AI to convince someone of a true vs. false claim, does truth win? In our *new* working paper, we find... ‘LLMs can effectively convince people to believe conspiracies’ But telling the AI not to lie might help. Details in thread
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Sacha Altay @sachaltay.bsky.social · 20/01/2026
I spend more and more time on Substack. I find it surprisingly good and stimulating. You can find me here: substack.com/@sachaaltay
substack.com
Sacha Altay | Substack
Postdoc working on misinformation, misperceptions, social media & trust.
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Rob Sica @robsica.bsky.social · 15/01/2026
"If the evidence is so weak, why is the concern so strong?"
theconversation.com
Evidence for link between digital technology use and teenage mental health problems is weak, our large study suggests
The research found little evidence that time spent on social media or frequent gaming causes mental health problems in early-to-mid adolescence.
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Tim Bale @timbale.bsky.social · 15/01/2026
“Our findings tell us that young people’s choices around social media and gaming may be shaped by how they’re feeling but not necessarily the other way around,” said Prof Neil Humphrey, a co-author [of a Manchester University study that followed 25,000 11- to 14-year-olds over three school years].
theguardian.com
Social media time does not increase teenagers’ mental health problems – study
Research finds no evidence heavier social media use or more gaming increases symptoms of anxiety or depression
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Saloni @scientificdiscovery.dev · 07/01/2026
NEW article by me! We can now visualize pathogens down to atoms; design vaccines in weeks; manufacture them in microbial factories; engineer them more precise than ever before. We're living through a golden age of vaccine development, but only if we continue to invest in them.
worksinprogress.co
The golden age of vaccine development - Works in Progress Magazine
The first vaccine was a lucky accident. Now we can design new vaccines in weeks, atom by atom.
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Felix M. Simon @felixsimon.bsky.social · 16/12/2025
Instead of Christmas albums, my favourite piece of writing: “Don’t panic (yet): Assessing the evidence and discourse around generative AI and elections” co-written with @sachaltay.bsky.social on why arguments we see around AI’s impact on elections and democracy are problematic. buff.ly/Zy7gCnL
knightcolumbia.org
Don’t Panic (Yet): Assessing the Evidence and Discourse Around Generative AI and Elections
Why claims about the impact of generative AI on elections have been overblown
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Simon Chauchard @simonchauchard.bsky.social · 16/12/2025
📣📣📣 GREAT, time-sensitive opportunity for senior/mid-career scholars to join us in Madrid at UC3M´s social sciences department (UC3M-ATRAE Program 2026) on an attractive pay+research funds package 📣📣📣 This does NOT happen everyday. THREAD below if this is of interest 1/n
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andyguess @andyguess.com · 09/12/2025
The Center for Information Technology Policy at Princeton invites applications for a Postdoctoral Fellow to work with an interdisciplinary team (me, @bstewart.bsky.social, and @manoelhortaribeiro.bsky.social). Link: puwebp.princeton.edu/AcadHire/app... Please apply by THIS SUNDAY, Dec. 14!
We are seeking a Fellow to lead cutting-edge research on short-form video content and its societal implications.

Bridging the gap between computer vision, causal inference, and computational social science, the Fellow will focus on the large-scale analysis of TikTok data (using an existing, massive dataset).

The position involves developing novel multimodal methods to understand how short-form algorithmic content shapes public opinion, political polarization, and online culture.

This is a unique opportunity to work at the forefront of the field, combining rigorous social science research designs with state-of-the-art computational techniques.
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Tom Costello @tomcostello.bsky.social · 06/12/2025
Any headline that ends in a question mark can be answered by the word “no” (Betteridge's law). Should we worry about gen AI persuasion shaping elections? I think “no” holds here. See knightcolumbia.org/content/dont... for a good summary of why we shouldn’t be too concerned
knightcolumbia.org
Don’t Panic (Yet): Assessing the Evidence and Discourse Around Generative AI and Elections
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David Rand @dgrand.bsky.social · 04/12/2025
🚨 New in Nature+Science!🚨 AI chatbots can shift voter attitudes on candidates & policies, often by 10+pp 🔹Exps in US Canada Poland & UK 🔹More “facts”→more persuasion (not psych tricks) 🔹Increasing persuasiveness reduces "fact" accuracy 🔹Right-leaning bots=more inaccurate
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simine vazire @simine.com · 03/12/2025
Preparing this talk gave me an opportunity to reflect on what lessons I've learned from psychology's replication crisis and credibility revolution, and what advice I would have for other fields. We've come a long way! Video: youtu.be/_vb1CNwC3CM?... Slides : osf.io/cuj62/files/...
osf.io
OSF
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Brendan Nyhan @brendannyhan.bsky.social · 12/11/2025
Experimental participants to us
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Nathanael Larigaldie @nathlarigaldie.bsky.social · 05/11/2025
Ok, just wow. If the content of this article is right, this is depressing. We're slowly reaching the point where ~100% of what I was taught in Social Psych was either innocently wrong or plainly frauded onlinelibrary.wiley.com/doi/abs/10.1...
onlinelibrary.wiley.com
Debunking “When Prophecy Fails”
In 1954, Dorothy Martin predicted an apocalyptic flood and promised her followers rescue by flying saucers. When neither arrived, she recanted, her group dissolved, and efforts to proselytize ceased....
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Lisa Oswald @lfoswaldo.bsky.social · 30/10/2025
We have a new preprint: osf.io/preprints/so... What have we learned about social media - the constantly moving target of empirical research - over the past decade?
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Sami Nenno @saminenno.bsky.social · 03/11/2025
Happy to share our new preprint “Content-based detection of misinformation expands its scope across politicians and platforms.” We analyzed misinformation at the text level in posts by German politicians on Facebook, Instagram, X, and TikTok. osf.io/preprints/so... 🧵1/8
osf.io
OSF
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Brendan Nyhan @brendannyhan.bsky.social · 27/10/2025
See also Peterson and Iyengar onlinelibrary.wiley.com/doi/full/10.... - "our findings support the motivated reasoning interpretation of misinformation; partisans seek out information with congenial slant and sincerely adopt inaccurate beliefs that cast their party in a favorable light."
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rasmuskleis.bsky.social @rasmuskleis.bsky.social · 31/10/2025
What if people appreciate having an abundance of content and communication, more than they feel overloaded by it? @annisch.bsky.social et al decided to have a look. Their results? "We found that appreciation for abundance was about twice as common as overload". Paper: journalqd.org/article/view...
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Oxford Internet Institute @oii.ox.ac.uk · 31/10/2025
NEW: In a recent Oxford-led study by @mmosleh.bsky.social, researchers analysed millions of social media posts containing links to news stories, across seven different social platforms. Read the full research paper here: www.pnas.org/doi/10.1073/...
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Brendan Nyhan @brendannyhan.bsky.social · 31/10/2025
"only about 5% of the variance in personality can be predicted from digital footprints, and personality‐tailored messages show negligible effects on behavior... When design and evaluation flaws are controlled, the combined end‐to‐end effectiveness of psychological targeting approaches zero."
onlinelibrary.wiley.com
The (In)Effectiveness of Psychological Targeting: A Meta‐Analytic Review
The use of psychological targeting—employing machine learning to predict consumer personality from digital footprints and subsequently tailoring persuasive messages—has emerged as a controversial yet...
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Fabio Votta📊🐧 @favstats.eu · 23/10/2025
🤖 𝐆𝐞𝐧𝐞𝐫𝐚𝐭𝐢𝐯𝐞 𝐀𝐈 𝐢𝐧 𝐭𝐡𝐞 𝟐𝟎𝟐𝟓 𝐃𝐮𝐭𝐜𝐡 𝐄𝐥𝐞𝐜𝐭𝐢𝐨𝐧: 𝐑𝐞𝐬𝐮𝐥𝐭𝐬 𝐟𝐫𝐨𝐦 𝐨𝐮𝐫 𝐂𝐚𝐦𝐩𝐀𝐈𝐠𝐧 𝐓𝐫𝐚𝐜𝐤𝐞𝐫 🇳🇱 Less than one week before the Dutch elections, @meinungsfuehrer.bsky.social & I looked at over 20k posts to reveal patterns in the usage of AI-generated visuals across Facebook, Instagram, TikTok and X. #tk2025 🧵Thread
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