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Wim De Neys

@wimdeneys.bsky.social
360 followers 106 following 37 posts

Psychological scientist @ CNRS & University of Paris

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Reposted by Wim De Neys
Nicolas Beauvais @nicolasbeauvais.bsky.social · 07/09/2026
1/4 🧵 New paper out (open access!) with @wimdeneys.bsky.social Can people tell a strong argument from a weak one on the fly, or only once they stop to think? We find that people already have some intuitive sensitivity to argument strength, but deliberation helps a lot.
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Jérémie Beucler @jeremiebeucler.bsky.social · 27/08/2026
In this blog post with @wimdeneys.bsky.social, we discuss some of our recent research on dual-process theories; check it out if you're interested! bppblog.com/2026/08/27/w...
bppblog.com
When fast is right and slow is wrong (rethinking intuition and deliberation)
The article by Jérémie Beucler and Wim De Nys critiques dual-process theory, highlighting some of its simplifications. They argue that intuition can be sound and deliberation sometimes ineffective …
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Jérémie Beucler @jeremiebeucler.bsky.social · 07/05/2026
Very nice piece on our recent paper with @wimdeneys.bsky.social by @carlhendrick.substack.com 🙌 carlhendrick.substack.com/p/rethinking...
carlhendrick.substack.com
Rethinking Fast and Slow
New evidence suggests the standard dual process story undersells intuition
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Jérémie Beucler @jeremiebeucler.bsky.social · 20/04/2026
Are you thinking in vain? New paper with @zoepurcell.bsky.social, @luciecharlesneuro.bsky.social, @wimdeneys.bsky.social & @kobedesender.bsky.social 𝘛𝘩𝘪𝘯𝘬𝘪𝘯𝘨 𝘪𝘯 𝘝𝘢𝘪𝘯: 𝘈𝘯 𝘌𝘷𝘪𝘥𝘦𝘯𝘤𝘦 𝘈𝘤𝘤𝘶𝘮𝘶𝘭𝘢𝘵𝘪𝘰𝘯 𝘈𝘤𝘤𝘰𝘶𝘯𝘵 𝘰𝘧 𝘉𝘪𝘢𝘴𝘦𝘥 𝘙𝘦𝘢𝘴𝘰𝘯𝘪𝘯𝘨 🔗 osf.io/preprints/ps... A 🧵
a man hanging from a scale where on one side there are really heavy stereotypes, and on the other side very light base-rates, to illustrate base-rate neglect
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Wim De Neys @wimdeneys.bsky.social · 21/01/2026
New work led by @jeremiebeucler.bsky.social who used LLMs to estimate stereotype strength in base-rate items. Great tool to create new material ;-)
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Wim De Neys @wimdeneys.bsky.social · 07/01/2026
Fast and slow insight. New paper with @jeremiebeucler.bsky.social showing that good convergent thinking is driven by sound intuitions. Modelling work links this to a denser semantic memory structure among good intuitors.
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Wim De Neys @wimdeneys.bsky.social · 10/12/2025
Chat with David Cooper about our latest research on how humans and AI evaluate intuitive vs deliberative thinking podcasts.apple.com/ca/podcast/w...
podcasts.apple.com
Wim De Neys: Intuitive Vs. Deliberative Thinkers - December 9, 2025
Podcast Episode · The Last Show with David Cooper · 2025-12-10 · 11m
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Jérémie Beucler @jeremiebeucler.bsky.social · 27/11/2025
Our paper with @zoepurcell.bsky.social, @luciecharlesneuro.bsky.social, and @wimdeneys.bsky.social has been accepted at Behavior Research Methods! 🥳 Here is the updated preprint: osf.io/preprints/ps... Also, the baserater package is now on CRAN: cran.r-project.org/package=base... #psynomBRM
osf.io
OSF
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Jérémie Beucler @jeremiebeucler.bsky.social · 16/10/2025
10/10 Huge thanks to my great co-authors @zoepurcell.bsky.social , @luciecharlesneuro.bsky.social and @wimdeneys.bsky.social, and to my lab @lapsyde.bsky.social. Stay tuned for the computational modeling part! 🤓 You can access the preprint here: osf.io/preprints/ps...
osf.io
OSF
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Communications Psychology @commspsychol.nature.com · 07/10/2025
People and LLMs evaluate deliberative reasoning more favorably than intuitive thinking—even when both yield accurate results. This preference appears to be intuitive itself and has implications for how we assess others’ and AI advise. @wimdeneys.bsky.social www.nature.com/articles/s44...
nature.com
Humans and LLMs rate deliberation as superior to intuition on complex reasoning tasks - Communications Psychology
People and LLMs evaluate deliberative reasoning more favorably than intuitive thinking—even when both yield accurate results. This preference appears to be intuitive itself and has implications for how we assess others’ and AI advise.
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Wim De Neys @wimdeneys.bsky.social · 30/09/2025
Paper is now published: www.nature.com/articles/s44...
nature.com
Humans and LLMs rate deliberation as superior to intuition on complex reasoning tasks - Communications Psychology
People and LLMs evaluate deliberative reasoning more favorably than intuitive thinking—even when both yield accurate results. This preference appears to be intuitive itself and has implications for how we assess others’ and AI advise.
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Jorge Peña 🇵🇸 @jorgeapenas.bsky.social · 22/09/2025
📢 Apply to our (2-year) research fellowships at @iast.fr Join a multidisciplinary, interdisciplinary, transdisciplinary, and indisciplinary group of scholars in Toulouse, walkable/cyclable pink city of chocolatines in the South of France. Deadline: November 15, 2025. www.iast.fr/research-fel...
iast.fr
Research Fellowships
Each year, IAST invites applications for post-doctoral Research Fellowships, which offer candidates an opportunity to devote themselves full-time to their research at the start of their careers. Fello...
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Jean-François Bonnefon @jfbonnefon.bsky.social · 20/09/2025
It's hiring season at @iast.fr! - 2y research postdoc contract - Full autonomy, you are your own PI - Awesome multidisciplinary environment - All social and behavioral sciences welcome - Seed funding for projects and workshops - Gorgeous city in the south of France www.iast.fr/research-fel...
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Nicolas Beauvais @nicolasbeauvais.bsky.social · 21/08/2025
Happy to share that my first paper is out in Thinking & Reasoning! 📄📢 With Aikaterini Voudouri, @boissinesther.bsky.social & @wimdeneys.bsky.social we show that deliberate reasoning helps not just to correct but also to justify intuitive judgments. 🔗Full paper: shorturl.at/JTeTi Quick thread below!
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Wim De Neys @wimdeneys.bsky.social · 07/08/2025
Moses, fast and slow ! @jeremiebeucler.bsky.social interesting evidence for sound intuiting (and reflection). My take home: Don't use semantic illusions as a pure test of cognitive reflection.
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Wim De Neys @wimdeneys.bsky.social · 12/07/2025
They should do something about the acronym though ;-)
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Wim De Neys @wimdeneys.bsky.social · 19/06/2025
"Defining deliberation for dual-process models of reasoning" is now published. Free online access to the published Nat Rev Psy version: rdcu.be/erM5T
rdcu.be
Defining deliberation for dual-process models of reasoning
Nature Reviews Psychology - Dual-process models propose that reasoning involves intuition and deliberation, but the conceptualization of deliberation remains unclear. In this Perspective, De Neys...
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Nina Franiatte @ninafraniatte.bsky.social · 17/06/2025
🚨Check out our new paper with @boissinesther.bsky.social, Alexandra Delmas & @wimdeneys.bsky.social in Acta Psych! 📹 We show that video debiasing training can boost reasoning accuracy - not just deliberation, but intuition too! 🔓 Open access: www.sciencedirect.com/science/arti... Quick summary👇
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Wim De Neys @wimdeneys.bsky.social · 08/05/2025
Goal: hopefully support more precise theorizing and empirical work on “System 2”—both in human and machine cognition. Full paper: osf.io/preprints/ps... (5/5)
osf.io
OSF
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Wim De Neys @wimdeneys.bsky.social · 08/05/2025
I propose guiding principles to avoid problematic misconceptions and point to critical outstanding issues we need to address in the coming years. (4/5)
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Wim De Neys @wimdeneys.bsky.social · 08/05/2025
Key point is that deliberation should be understood as multifunctional, serving multiple, complementary purposes. (3/5)
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Wim De Neys @wimdeneys.bsky.social · 08/05/2025
Although deliberation is central to dual-process theories, its conceptualization remains vague. I sketch a framework clarifying what System 2 deliberation is and does. (2/5)
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Wim De Neys @wimdeneys.bsky.social · 08/05/2025
New forthcoming perspective paper in Nature Reviews Psychology: “Defining System 2 deliberation for dual-process models” preprint: osf.io/preprints/ps... (1/5)
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Flavia Mancini @flaviamancini.bsky.social · 08/03/2025
How to push back against the rise of endless administrative burden in academia?
academic.oup.com
On the responsibilities of intellectuals and the rise of bullshit jobs in universities
You may never have considered yourself to be one. Why would you? But if you’re reading this, there is more than a likelihood that you are one. If you’re a
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Wim De Neys @wimdeneys.bsky.social · 04/03/2025
It's been contested from the start :-) but good point: "examined" would be more accurate
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Wim De Neys @wimdeneys.bsky.social · 18/02/2025
(6/6) This preference can also be misused. If people trust deliberation intuitively, it means both humans & AI can appear more trustworthy simply by framing decisions as “carefully reasoned”—even if they aren’t. Read the full study: doi.org/10.31234/osf...
doi.org
OSF
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Wim De Neys @wimdeneys.bsky.social · 18/02/2025
(5/6) Why might this matter (even for "fast-and-slow" haters 😉)? 1️⃣ Deliberation shapes trust in advice 2️⃣ AI models already simulate deliberation (e.g., chain-of-thought reasoning). 3️⃣ Knowing this, AI developers can boost trust & fight algorithm aversion. But…
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Wim De Neys @wimdeneys.bsky.social · 18/02/2025
(4/6) Even under time pressure or cognitive load, participants still rated deliberation as better—ironically, indicating that the deliberation preference is itself intuitive. Interestingly, ChatGPT (3.5 & 4) showed the same preference, suggesting AI models encode human folk beliefs about reasoning
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Wim De Neys @wimdeneys.bsky.social · 18/02/2025
(3/6) We asked participants to rate individuals who reasoned intuitively vs. deliberatively—while controlling whether the individual was portrayed as accurate or not. Across all conditions, we find a strong preference for deliberation.
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Wim De Neys @wimdeneys.bsky.social · 18/02/2025
(2/6) While dual process research has pinpointed the mechanics of intuitive and deliberate thinking, we still lack understanding of how people perceive and value these modes of thought—what might be termed a “folk theory” of fast-and-slow thinking.
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Wim De Neys @wimdeneys.bsky.social · 18/02/2025
New preprint: “Folk Thinking, Fast and Slow: Intuitive Preference for Deliberation in Humans and Machines” Pop culture often praises intuition (“Blink”, Steve Jobs). But do we really trust it? Across 13 studies, we find a strong intuitive preference for deliberation. tinyurl.com/8r54dmyn (1/6)
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Nicolas Beauvais @nicolasbeauvais.bsky.social · 20/01/2025
Short blog post about our work with Matthieu Raoelison & @wimdeneys.bsky.social for the Tango Horizon European project! 🧠🤖 👉 tango-horizon.eu/2025/01/16/h...
tango-horizon.eu
How insights about human reasoning can help us design better AI systems | tango-horizon.eu
TANGO BLOGPOST The rise of everyday AI Artificial intelligence (AI) is seamlessly integrated into our daily lives—from the algorithms that find the best rou ...
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Jean-Baptiste André @jbaptistandre.bsky.social · 14/01/2025
📢 Come study cognitive science in Paris! The Master’s program in Cognitive Science at @ENS_ULM, @psl_univ, and @EHESS_fr is now accepting applications for the 2025-2026 academic year. 🗓 Deadline: March 13, 2025 💻 Apply here: master-cognitive-science.ens.psl.eu/en/applicati...
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Wim De Neys @wimdeneys.bsky.social · 04/01/2025
For once the EU is not falling behind! Who needs cutting edge research when you can spend your time uploading forms to the Horizon Europe continuous reporting portal, right?
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Nick Byrd, Ph.D. @byrdnick.com · 09/12/2024
📣 I'm #hiring a 3-year #postdoc! - Live anywhere in the United States! - Improve #decisionMaking and #wellbeing with #quantitative #cogSci. Share the application URL here and elsewhere.👇 geisinger.wd5.mywork... Letters can be sent to me with "R-69755" in the subject line.
Job descriptionQualificationsThe institution's history and unique benefits.What to submit when applying to the job
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Esther Boissin @boissinesther.bsky.social · 13/12/2024
Want to challenge your biases and boost your logical reasoning? 🚀 Check out this fantastic website by my amazing colleagues @wimdeneys.bsky.social and @ninafraniatte.bsky.social. Dive into engaging videos that make logical reasoning accessible to everyone. Available in English and French.
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Nina Franiatte @ninafraniatte.bsky.social · 12/12/2024
🧠 Cogitum: Train your logical reasoning! As part of our research, @wimdeneys.bsky.social and I developed video-based training to boost sound reasoning 🎥 And we need your help to test it! Try it anonymously (& share it!) in French or English here: cogitum-site.powerappsportals.com/homePage
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Wim De Neys @wimdeneys.bsky.social · 25/11/2024
Thanks for the overview, Nick, super convenient!
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Nick Byrd, Ph.D. @byrdnick.com · 23/11/2024
I’m sharing talks and posters from this weekend’s @SJDM-tweets.bsky.social conference. First, a talk about the #jobMarket — by the way, I’m hiring a 3-year #postdoc researcher who does quantitative #decisionScience and can #workFromHome in the U.S.: geisinger.wd5.myworkdayjobs.com/GeisingerExt... …
Job descriptionQualificationsAbout GeisingerWhat to submit when applying to the job
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Wim De Neys @wimdeneys.bsky.social · 23/11/2024
Yes, we've got the iconic background photo thing down.
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Wim De Neys @wimdeneys.bsky.social · 14/11/2024
Of course. More than the 15 men I listed too. Just wanted to give the pack thing a try with the few people I had as bluesky contacts. Very happy to add more scholars whatever their gender may be.
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Wim De Neys @wimdeneys.bsky.social · 18/10/2024
Let's give this a try ;-) go.bsky.app/TBS14hQ
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David Rand @dgrand.bsky.social · 12/09/2024
🚨Out in Science!🚨 Conspiracy beliefs famously resist correction, ya? WRONG: We show brief convos w GPT4 reduce conspiracy beliefs by ~20%! -Lasts over 2mo -Works on entrenched beliefs -Tailored AI response rebuts specific evidence offered by believers www.science.org/doi/10.1126/...
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Wim De Neys @wimdeneys.bsky.social · 15/07/2024
Yes, but the server is only down half of the time !
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Dead McCoy 💀🖖 @tedmccoy.bsky.social · 13/07/2024
universities: we bought all new software to do the same thing you already do now with ease. It completely sucks and cost us 13 million dollars.
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Wim De Neys @wimdeneys.bsky.social · 24/06/2024
Nah, it would need to get to late career PI intelligence level for that
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Wim De Neys @wimdeneys.bsky.social · 21/06/2024
Findings fit well with the pattern we're seeing in logical reasoning tasks. Gives some further credence to the idea of a "smart system 1" imo
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Wim De Neys @wimdeneys.bsky.social · 21/06/2024
New paper with Katerina Voudouri and Michal Bialek showing that when people face risky decisions, they can intuitively determine which choices have better expected value and avoid loss aversion without careful deliberation. www.sciencedirect.com/science/arti...
sciencedirect.com
Fast & slow decisions under risk: Intuition rather than deliberation drives advantageous choices
Would you take a gamble with a 10% chance to gain $100 and a 90% chance to lose $10? Even though this gamble has a positive expected value, most peopl…
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Wim De Neys @wimdeneys.bsky.social · 14/06/2024
No, very robust effect on trained task but no transfer (neither on intuitive nor deliberate responses).
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Wim De Neys @wimdeneys.bsky.social · 22/04/2024
"Adieu Bias!": New paper with Nina Franiatte et al. in which we replicated previous intuitive debiasing findings in la douce France. Thanks openAI for the awesome title suggestion ;-)
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