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Posts by Hugo Mercier

Causality with Tadeg Quillien
Causality with Tadeg Quillien YouTube video by Evolutionary Psychology (The Podcast)

This week, we talk to @tadegquillien.bsky.social about causality.
youtu.be/vp5mnz4eSiw
podcasts.apple.com/us/podcast/e...
www.podbean.com/eas/pb-fw3bn...

6 days ago 7 2 0 1
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We are offering two 4-year PhD positions in our new SNF project "The Evolutionary Roots of Altercentrism"

1 week ago 36 49 0 1
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Social media users experience more political hostility in less economically equal and less democratic societies - Nature Human Behaviour Drawing on survey data from 30 countries, Bor et al. find that online political hostility is higher in more unequal and less democratic societies.

New study showing that online hatred is worse in countries with higher economic and political inequality. www.nature.com/articles/s41...

By @m-b-petersen.bsky.social et al.

1 week ago 120 48 0 7
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Plural Causes Abstract. Causal selection is the process underlying our intuition that an outcome happened because of a given event, or that an event is the cause of an outcome. When a forest catches fire after a li...

Our new paper on causal judgment is now out! Led by Can Konuk, with Salvador Mascarenhas.

We study how causes that feature several variables (`A and B caused E') are represented in the human mind.

direct.mit.edu/opmi/article...

2 weeks ago 15 4 1 0
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🔍 What happens when you give middle-schoolers unrestricted access to ChatGPT for science tasks?

Findings from our new paper led by Rania Abdelghani w/ @koumurayama.bsky.social @celestekidd.bsky.social Hélène Sauzéon 🧵👇

2 weeks ago 27 10 1 0
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Thrilled that my paper (w/@sarahobolt.bsky.social,@catherinedevries.bsky.social,@simonecremaschi.bsky.social) was accepted at the American Political Science Review!

We find that declining public services fuel support for the populist right — and show why the right benefits more than other parties 🧵

2 weeks ago 351 146 8 21
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SCORE | Center for Open Science SCORE shows that there is no shortcut to producing credible research findings, and there is no single indicator of trustworthiness. Research progress depends on transparency, rigor, and establishing r...

SCORE, a collaboration of 865 researchers, is now released as three papers in Nature, six preprints, and a lot of data (cos.io/score/). SCORE examined repeatability of findings from the social-behavioral sciences and tested whether human and automated methods could predict replicability.

2 weeks ago 190 106 1 32
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Thrilled to share that our new paper is now out in @cognitionjournal.bsky.social: "Who knows what? Bayesian Competence Inference guides Knowledge Attribution and Information Search," with @oliviermorin.bsky.social , @hugoreasoning.bsky.social & @tadegquillien.bsky.social!

Link: tinyurl.com/ykyhxcc6

3 weeks ago 46 20 2 1
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Zebra finches transform manipulated songs with shuffled syllables to exhibit linguistic laws - Animal Cognition Animal Cognition - Linguistic laws are increasingly used as markers of efficiency in non-human communication, but it remains unclear how rapidly these patterns can emerge. In this re-analysis of...

New paper out today! When baby zebra finches are tutored with manipulated songs with shuffled syllables, they transform them to be consistent with linguistic laws 🐥 Reanalysis of data from James and Sakata (2017) link.springer.com/article/10.1...

4 weeks ago 35 10 0 0
Core Intuitions of Psychological Non-Contradiction: Infants Assume That Individual Agents Act and Communicate Coherently AbstractHumans generally posit that contrary mental states are unlikely to co-exist within a single mind. We tested the early ontogeny of this assumption in two domains: action and communication. Studies 1A and 1B tested whether 9-month-old infants assume that agents act coherently. Infants watched interactions between two hands whose owner(s) were invisible. In the contrary goals condition, the hand performed contrary actions—one hand reached for an object while the other impeded it. Later, during test trials, infants learned that the hands belonged to one or two people. Looking-time patterns across the contrary goals and a baseline conditions indicated that clear goal conflict led infants to infer two agents, suggesting they viewed it as unlikely for a single person to thwart their own goal. Study 2 tested whether infants assume communicative coherence, testing whether they assume that a single informant is unlikely to entertain and communicate conflicting information while two informants might do so. Informants pointed to indicate a toy’s location to 15-month-olds. When two different informants each pointed to a different place, infants did not follow one pointing gesture more than the other. However, when a single informant pointed successively to two locations, infants followed the second gesture, implying they viewed it as an updated, not contradictory, message. Thus, infants assumed that a single informant is unlikely to contradict themselves (i.e., by asserting that a toy is simultaneously in two locations). These findings reveal an early-emerging assumption of psychological coherence in infants’ representation of other minds, across both action and communication contexts.
4 weeks ago 8 6 0 0
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The Engine of Scientific Discovery: How New Methods and Tools Spark Major Breakthroughs Abstract. How do we spark new scientific discoveries? Why do some breakthroughs seem even accidental? And most importantly, how can we accelerate them and

⚗️🔭 How do we spark new scientific discoveries? Why do some breakthroughs seem accidental?

The new book 'The Engine of Scientific Discovery' by CPNSS Research Associate Alexander Krauss is for anyone who wants to understand how we make discoveries.

➡ Link to the book: doi.org/10.1093/oso/...

1 month ago 15 16 0 0
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The Property in Intellectual Property: Reputation Is Harder to Share Than Ideas Intellectual property (IP) law is designed to protect the ownership of ideas and stimulate innovation, yet pervasive non-compliance suggests a deep divide between legal mandates and public moral intu...

"Unlike the ideas themselves, reputation for authorship and credit is rivalrous: audiences can allocate full credit only once, so any undue credit to a copier necessarily subtracts deserved credit from a creator and misleads observers."

1 month ago 4 2 0 0
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The ecological approach to culture The prevailing view in the literature treats cultural dynamics as fundamentally distinct from other ecological processes—governed by a second system o…

🧵 1/4
Last year, Nicolas Baumard and I published a target article in EHB, where we propose that cultural phenomena emerge from feedbacks between evolved psychology and ecological legacies, the same mechanisms at work in any ecosystem:

www.sciencedirect.com/science/arti...

1 month ago 25 7 1 0

Murders in the Rue Morgue was a parody, I have found the post and the website about it!

The site linked is here
wdl.mcdaniel.edu

And it's really rather good fun, some eyebleedingly bad prose, of course

1 month ago 129 54 5 1
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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!

1 month ago 106 49 1 2
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The effects of Facebook and Instagram political advertisements on the 2020 US election - Nature Human Behaviour To study the effects of political advertising, we conducted a field experiment with over 60,000 participants. Removing political advertisements from the Facebook and Instagram feeds of randomly select...

Great new study of the (lack of) effects of political advertising: "Removing political advertisements from the Facebook and Instagram feeds ... did not have a detectable effect on political knowledge, polarization, turnout or political participation."

www.nature.com/articles/s41...

1 month ago 10 2 0 1
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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

1 month ago 55 33 6 5

Economists: we award Nobel Prizes for work on efficient institutions and minimizing transaction costs.
Also Economists: the review process at the American Economic Review.

1 month ago 172 40 9 0
Amplifiers of Epistemic Posture Essays and writing on AI

I'm a cognitive scientist with an interest in epistemic vigilance, and this essay that's been going around gave me pause.

I don't think it's straightforward to apply the concept of epistemic vigilance to interactions with LLMs, as this essay does.

🧵/

sbgeoaiphd.github.io/rotating_the...

1 month ago 297 123 8 34
Fiche de recrutement CDD IR CSS CREST.pdf Nextcloud - a safe home for all your data

🚨Recrutement au CREST @crestumr.bsky.social

Ingénieur de recherche CDD 3 ans support computationnel aux sciences sociales

Venez rejoindre notre cellule données appui au sciences sociales computationnelles !

Fiche de poste ▶️ nextcloud.lab.groupe-genes.fr/s/XMe4EGtRfb...

Candidature < 15 avril

1 month ago 9 15 1 0
Explaining the paradoxical effects of poverty on risk taking: The Desperation Threshold Model | Behavioral and Brain Sciences | Cambridge Core Explaining the paradoxical effects of poverty on risk taking: The Desperation Threshold Model

In poverty, do people take more or less risk? Some theories contend that they avoid risk out of caution. Others that they take risks (e.g. crime) out of desperation.

In our new paper in BBS, we show that they are the two sides of the same coin: the desperation threshold.

Peer commentary call soon!

1 month ago 37 18 2 1

I'm hiring a postdoc at @cmu.edu (w/ far.ai & @dgrand.bsky.social + @gordpennycook.bsky.social)!

How do LLMs shape human beliefs — and what do we do about it? AI safety meets behavioral science.

Open to technical and social science backgrounds.

1 month ago 42 27 1 3

In this new paper, @klopfenstein.bsky.social shows that how surprising an explanation is accounts for a good share of its appeal, suggesting that surprising explanations (the aliens built the pyramids!) can be popular even if people aren't really convinced they're great explanation

1 month ago 15 1 1 0
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Front cover of my book, titled "Comparative musicology: Evolution, universals, and the science of the world's music" (published today by Oxford University Press)

Front cover of my book, titled "Comparative musicology: Evolution, universals, and the science of the world's music" (published today by Oxford University Press)

1st of my 4-page essay published in Nature today titled "Music is not a universal language - but it can bring us together when words fail"
Picture caption: "Puerto Rican rapper Bad Bunny (centre) performed in Spanish at the half-time show of the 2026 American Football Super Bowl LX."

1st of my 4-page essay published in Nature today titled "Music is not a universal language - but it can bring us together when words fail" Picture caption: "Puerto Rican rapper Bad Bunny (centre) performed in Spanish at the half-time show of the 2026 American Football Super Bowl LX."

My book is now published! 🌏🎶🧪

You can download it for free at academic.oup.com/book/62353 - I’d be grateful if you do!
I also published an accessible summary with audio/video today in @nature.com: www.nature.com/articles/d41...
Try reading that first, then give the whole book a read if you like it!

1 month ago 112 51 7 6
Top panel: My plot of US adult female and male height distributions, which are much narrower, and overlap less than in the figure from Fuentes, which is in the bottom panel.

Top panel: My plot of US adult female and male height distributions, which are much narrower, and overlap less than in the figure from Fuentes, which is in the bottom panel.

1. After I posted my critical review of @anthrofuentes.bsky.social Sex is a Spectrum, a colleague pointed out that his figure of adult heights by sex (bottom panel👇) can't be right: there aren't that many US adults shorter than 4' or taller than 7'

Turns out Fuentes' data are made up 🧪 #BioAnth 🧵

2 months ago 32 9 3 0
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PhD student grant (3 years) on the evolution of written communication My team recruits a PhD student to work under the supervision of Olivier Morin on the evolution of written communication, within a project jointly led by Olivier Morin, Hugo Mercier, and Marc Allassonn...

CALL: a PhD grant (3 years) to do a PhD with me at @cognitionens.bsky.social on the evolution of graphic codes. euraxess.ec.europa.eu/jobs/410213

2 months ago 25 34 0 7

Félicitations, c'est super !

2 months ago 2 0 1 0
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Long format. Enquête sur une supercherie : le prof d’université s’est-il inventé un « Prix Nobel » ? Professeur de Lettres à l’Université Marie & Louis Pasteur de Besançon, le Montbéliardais Florent Montaclair est le lauréat 2016 de la Médaille d’or de philologie, une science qui a pour objet l’étude historique d’une langue par l’analyse critique des textes. Assimilée au Prix Nobel et à la Médaille Fields, cette récompense internationale n’a en réalité aucune existence institutionnelle. C’est un faux. La stratégie qui a été mise en place pour faire croire le contraire, et a abusé beaucoup de monde, y compris le milieu universitaire, est un singulier mélange de sophistication, d’approximation et de culot monstre.

Votre article du dimanche soir: l'invention d'un prix Nobel ou le narcissisme académique dans toute sa splendeur. Incroyable enquête de l'Est Républicain

www.estrepublicain.fr/faits-divers...

2 months ago 98 41 15 24

@evoroseman.bsky.social and Auerbach nail the fatal flaw in the ESS: organisms somehow adapt to completely novel situations without natural selection. It's basically Intelligent Design, imo, but with the organism as the intelligent designer instead of God 🧪 #BioAnth 1/2

2 months ago 12 2 5 2
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New paper in @pnas.org: www.pnas.org/doi/abs/10.1...

Coupling surveys of ~8% of the adult Danish population & results of 123 million covid-tests, we show that psychological feelings of coping lowered infection risk. Feelings of fear did not.

Authorities should empower people, not scare them.

2 months ago 31 12 2 1
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