Scholar

Jean‐Baptiste André

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H-index: 26
Psychology 21%
Sociology 19%
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Reposted by: Jean‐Baptiste André, Rebecca Sear, David W. Lawson

ehbea.bsky.social
EHBEA is looking for new PRESIDENT and SECRETARY for 2026-2029! 👀

If you know of anybody who could represent EHBEA, nominate them as president!

If you know with good organisational skills, nominate them as secretary!

DEADLINE: 16/12/2026

HERE IS THE FORM 👇

docs.google.com/document/d/1...
EHBEACommitteeNominationForm_Pres_Sec.doc
EHBEA Committee 2026-2029: Nomination Form The EHBEA Steering Committee is calling for nominations for the following open committee positions for 2026-2029. You are invited to nominate one or more c...
docs.google.com
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by Jean‐Baptiste André

jbaptistandre.bsky.social
6/ Read the article @royalsocietypublishing.org
👉 doi.org/10.1098/rspb...
Evolutionary parsimony: an equilibrium refinement that sharply constrains the space of outcomes in games with multiple equilibria | Proceedings of the Royal Society B: Biological Sciences
Evolutionary game theory loses much of its predictive power in games with multiple equilibria. For such games, this article introduces a simple and general refinement principle, grounded in evolutiona...
doi.org
5

by Jean‐Baptiste André

jbaptistandre.bsky.social
5/ Main consequence: in plausible evolutionary equilibria, reciprocal cooperation is guided by real cues of mutual benefit, never by bizarre rules tied to arbitrary cues unrelated to payoffs.
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by Jean‐Baptiste André

jbaptistandre.bsky.social
4/ What this article shows:

In reality, the bizarre strategies of the folk theorem simply have no chance of ever emerging in the first place. So there is no need for mechanisms to choose between them—the problem is essentially an artefact of misapplied game theory.
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by Jean‐Baptiste André

jbaptistandre.bsky.social
3/ The most common solution in the literature: group selection.

Since equilibria are too many, you (supposedly) need group selection to pick the most cooperative ones.
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by Jean‐Baptiste André

jbaptistandre.bsky.social
2/ Why is this a problem?
Because it prevents game theory from making precise predictions about social behavior.
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by Jean‐Baptiste André

jbaptistandre.bsky.social
1/ The old problem: the folk theorem and the extravagant diversity of equilibria in repeated games.
Game theory allows a proliferation of bizarre, counterintuitive patterns of behavior to qualify as equilibria.
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by Jean‐Baptiste André — Reposted by: Hugo Mercier

jbaptistandre.bsky.social
Ever wanted to read about an old problem almost nobody cares about anymore?

Well, I wrote about it.

🧵
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Reposted by: Jean‐Baptiste André, Paul E. Smaldino, David W. Lawson

jorgeapenas.bsky.social
📢 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...
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...
www.iast.fr
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Reposted by: Jean‐Baptiste André, Hugo Mercier, Olivier Morin

edgardubourg.bsky.social
We often have to judge who is knowledgeable—precisely when we are not. Can humans really do that? Our new paper in Psychological Science shows that, surprisingly, we can. drive.google.com/file/d/1b15E...
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Reposted by: Jean‐Baptiste André, Stanislas Dehaene

franckramus.bsky.social
MOOC "la psychologie pour les enseignants"
Fun Mooc, ENS- PSL et Réseau Canopé
Pour remédier à l'éparpillement des sites, voici un lien unique pour accéder à toutes les vidéos, parcours et ressources:
MOOC psycho pour enseignants | Linktree
Tous les liens!
linktr.ee
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Reposted by: Jean‐Baptiste André, Hugo Mercier

dieterlukas.fediscience.org.ap.brid.gy
Our #study finds that #male #dominance isn't the norm among #primates, and starts to unravel what shapes flexibility in intersexual power

paper (OA) https://www.pnas.org/doi/10.1073/pnas.2500405122

press release https://www.mpg.de/24986976/0630-evan-beyond-the-alpha-male-150495-x?c=2249
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by Alberto Acerbi — Reposted by: Jean‐Baptiste André

acerbialberto.com
EHB commentaries on Baumard and André's "The ecological approach to culture" are growing (see "Commentaries" section at the end). Good.
www.sciencedirect.com/journal/evol...
a man in a red jacket is eating a sandwich
ALT: a man in a red jacket is eating a sandwich
media.tenor.com
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Reposted by: Jean‐Baptiste André

robsica.bsky.social
"a forest is not treated as the output of a second inheritance system or as a group-level adaptation... culture is not a transmitted substance; it is the structured context that emerges from repeated and overlapping individual actions"
Reconciling Our Three Traditions: Human Behavioral Ecology, Evolutionary Psychology, and Cultural Evolution - HBES
– by Nicolas Baumard & Jean-Baptiste André The evolutionary social sciences are grounded in the idea that evolutionary theory provides a unified framework to explain human behavior, including social n...
www.hbes.com
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Reposted by: Jean‐Baptiste André

humbehevosoc.bsky.social
Nicolas Baumard & Jean-Baptiste Andre’s “ecological view of culture” provides an exciting new perspective that links Behavioral Ecology, Evolutionary Psychology, & Cultural Evolution. Read more in their HBES blog post: www.hbes.com/reconciling-...
Reconciling Our Three Traditions: Human Behavioral Ecology, Evolutionary Psychology, and Cultural Evolution - HBES
– by Nicolas Baumard & Jean-Baptiste André The evolutionary social sciences are grounded in the idea that evolutionary theory provides a unified framework to explain human behavior, including social n...
www.hbes.com
2 3 9

Reposted by: Jean‐Baptiste André

jorgeapenas.bsky.social
Here, weird guy from X, I fixed it for you:

"If a scientific society wants to be welcoming to [...] students & researchers [from the Global South], does it make sense to hold its next annual conference in a country that's notorious for [being located in the Global South]?"

The answer is Yes.
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by Hugo Mercier — Reposted by: Jean‐Baptiste André, Olivier Morin, Eric Hehman

hugoreasoning.bsky.social
We have a lovely new paper out, showing that even ignorant people can be very good at recognising who's knowledgeable based on minimal cues
edgardubourg.bsky.social
Edgar Dubourg @edgardubourg.bsky.social · Jun 2
We often have to judge who is knowledgeable—precisely when we are not. Can humans really do that? Our new paper in Psychological Science shows that, surprisingly, we can. drive.google.com/file/d/1b15E...
5 21 73

Reposted by: Jean‐Baptiste André

xrg.bsky.social
the functional form of moral judgment is (sometimes) the nash bargaining solution

new preprint👇
figure 2 from our preprint, reporting the results from two experiments we measure moral judgments about dividing money between two parties and manipulate the degree of asymmetry in the outside options each party has we find that moral judgments track predictions from rational bargaining models like the nash bargaining solution and the kalai-smorodinsky solution in a negotiation context by contrast, in a donation context, moral intuitions completely reverse, instead tracking redistributive and egalitarian principles preprint link: https://osf.io/preprints/psyarxiv/3uqks_v1
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Reposted by: Jean‐Baptiste André

thetransmitter.bsky.social
Alona Fyshe @alonaf.bsky.social on the BabyLM Challenge, a competition that trains language models (LMs) on smaller datasets, more akin to how a baby learns, in search of solutions to some of the major challenges of today’s LLMs.

#NeuroAI #neuroskyence

www.thetransmitter.org/neuroai/the-...
Can babies inspire more efficient learning algorithms?
A competition that trains language models on smaller datasets, more akin to how a baby learns, seeks solutions to some of LLM’s major challenges.
www.thetransmitter.org
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Reposted by: Jean‐Baptiste André, Nichola Raihani

lfitouchi.bsky.social
🧵New paper out in Cognition

Why do people moralize harmless carnal sins (e.g. gluttony, masturbation)?

@danielnettle.bsky.social & I find that these behaviors activate reciprocity-based moral judgment—no need for a distinct "purity" module.

50 days free link: authors.elsevier.com/a/1l18D2Hx2-...
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Reposted by: Jean‐Baptiste André, Johannes Breuer

psych.peercommunityin.org
The PCI Psychology website is live! psych.peercommunityin.org We're working hard to be ready for launch (planned May 2025) but there's plenty you can do in the meantime to help it along. Go check it out! #psychscisky #scipub
PCI Psychology
Peer Community in Psychology
psych.peercommunityin.org
32 43

Reposted by: Jean‐Baptiste André

samroberts7.bsky.social
Many thanks to all organisers of #EHBEA2025 for putting on such an inclusive and welcoming conference! @ehbea.bsky.social @ehbea2025.bsky.social
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Reposted by: Jean‐Baptiste André

gillianrbrown1.bsky.social
Looking forward to EHBEA 2026 in Leiden, Netherlands. Dates for diary: 15-17 Apr 2026 #ehbea2025
Slide with information about next year's conference.
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Reposted by: Jean‐Baptiste André

ehbea2026.bsky.social
🧠✨ EHBEA 2025 — Tuesday Highlights ✨🧠

From cultural transmission to chatbots and grandmothers, here's what's coming up on Day 2 (April 15) at #EHBEA2025.

A thread 👇

@ehbea.bsky.social #HumanBehaviour #EvPsych #Anthropology #Research #EHBEA
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Reposted by: Jean‐Baptiste André

View post

Reposted by: Jean‐Baptiste André

ehbea2026.bsky.social
Today is the day!! #EHBEA2025 is now here!! 😁🎉

Come find us at registration, which opens at 2pm!

Then:
- Pre-conference panel on big team science, 2-3pm
- Conference opening @330pm
- Plenary by Russell Hill @4pm
- Reception @5pm

Can't wait to see you all today!

@ehbea.bsky.social
5 8

Reposted by: Jean‐Baptiste André

ehbea2026.bsky.social
✨️Guess what?!?✨️

We're putting together a starter pack to make it easy to follow EHBEA 2025 presenters and attendees!! 🔥👩‍🔬

Want to be added? Drop a comment below! 👇

#EHBEA2025 #Evolution #HumanBehaviour

@ehbea.bsky.social
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Reposted by: Jean‐Baptiste André

ehbea2026.bsky.social
🚨 We’re so excited to welcome you to #EHBEA2025 — starting THIS MONDAY in Newcastle! 🎉

We’re opening with a bang 💥: A pre-conference panel on Big Team Science at 2pm!

What worked, what didn't & more!

📝 Register: tinyurl.com/RegisterTeam...

#TeamScience #HumanBehaviour #EHBEA
@ehbea.bsky.social
Home | EHBEA2025
www.ehbea2025.com
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Reposted by: Jean‐Baptiste André

ehbea2026.bsky.social
Last, but denfinitely not least:

🧭 Code of Conduct

We take your safety and wellbeing seriously.

Please review EHBEA’s Code of Conduct.

Concerns? Speak to Amanda Rotella, Paula Sheppard, or David Coall. [10/10]
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Reposted by: Jean‐Baptiste André

ehbea2026.bsky.social
✅ What to Bring

No conference swag = more sustainable & better catering! 🥗

Don’t forget:
• Notepad & pen
• Bag
• Refillable water bottle

More info on the website: www.ehbea2025.com [9/10]
Home | EHBEA2025
www.ehbea2025.com
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References

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