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Sami Beaumont

@samibeaumont.bsky.social
65 followers 103 following 66 posts

Psychiatrist @ GHU Paris psychiatry and neurosciences Research in computational cognitive science @computationalbrain.bsky.social

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Sami Beaumont @samibeaumont.bsky.social · 04/06/2026
A highly competitive environnement where ressources are spent in evaluation comittees so only the best can survive.
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Mehdi Khamassi @khamascience.bsky.social · 22/05/2026
Ça se passe en direct sous nos yeux. Nous ne pourrons pas dire que nous ne savions pas. www.mediapart.fr/journal/inte... Pour celles et ceux qui souhaitent en apprendre davantage (ATTENTION, coeurs sensibles s'abstenir) : www.btselem.org/publications...; www.ohchr.org/sites/defaul...
Copie d'écran d'un article de Mediapart intitulé 'Vidéo de Ben Gvir : quand les prisonniers sont palestiniens, l’Occident regarde ailleurs', 22 mai 2026.
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Berna Devezer @devezer.bsky.social · 30/04/2026
📣 The difference between replicable and not replicable is not itself scientifically replicable. 📣 New work with Erkan Buzbas, showing that verdicts such as "X% of results replicated" are based on an inferential machinery that doesn't work. arxiv.org/abs/2604.26268
Screenshot of a paper's title page. Title: "The Difference Between 'Replicable' and 'Not replicable' is not Itself Scientifically Replicable". Authors: Berna Devezer and Erkan O. Buzbas, both at the University of Idaho — Devezer in the Department of Business and the Institute for Modeling Collaboration and Innovation, Buzbas in the Department of Mathematics and Statistical Science. Authors contributed equally. Corresponding author: bdevezer@uidaho.edu.
Abstract: Replication studies estimate the replicability rate of scientific results by aggregating binary verdicts of experiments. Exact replications are rarely attainable, so most replication sequences are non-exact. Experiments differ in ways that matter and do not share a single common data-generating process. We formalize two statistical interpretations of this non-exactness. In a shared latent rate model (benchmark), experiments are exchangeable and depend on a common random replicability rate. In a conditionally independent rates model (operational), each experiment has its own replicability rate drawn independently from a population distribution. Under the shared latent rate model, even small variability among replicability rates induces an irreducible variance floor on the estimated mean replicability rate that cannot be eliminated by adding more replications. Under the conditionally independent rates model, the degree of non-exactness is not identifiable from standard replication data, because one binary verdict per experiment contains no information about between-experiment heterogeneity. Researchers therefore cannot tell which precision regime they are operating in or whether high- and low-replicability sequences can be distinguished in principle. As a result, the usual data structure of one binary verdict per experiment cannot support reliable demarcation between "replicable" and "not replicable" results and systematically understates uncertainty, making high- and low-replicability sequences appear discrim…
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Cédric Brun @cedricbrun.bsky.social · 27/04/2026
Quelques échanges récents ici m’ont donné envie de proposer un panorama de la philosophie des sciences contemporaine. Non pour défendre une corporation, mais pour corriger une image assez datée de la discipline. Je resterai volontairement assez schématique pour ne pas alourdir un thread long. 1/n
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Colin @colin-fraser.net · 12/04/2026
A popular account of the so-called deep learning revolution is that all natural understanding of the problem can be abdicated; we just throw all the data in the NN and gradient descent goes brr, but that’s not right. We have to have the right structural prior and a NN architecture to express it.
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Joao Barbosa @jbarbosa.org · 03/04/2026
Wanna do neuroscience in Paris but can't find interesting lab? Want to come do a sabbatical but don't know who to collaborate? Check this webpage aggregating ~all the neuroscience labs (+200) in Paris. ⚠️only the information of 'verified' profiles is reliable⚠️ Please retweet 🙏 parisneuro.fr
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Minas Karamanis @minaskar.bsky.social · 30/03/2026
Hey, I wrote a thing about AI in astrophysics ergosphere.blog/posts/the-ma...
ergosphere.blog
The machines are fine. I'm worried about us.
On AI agents, grunt work, and the part of science that isn't replaceable.
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Sami Beaumont @samibeaumont.bsky.social · 02/04/2026
First repost is a bot give me a break
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Sami Beaumont @samibeaumont.bsky.social · 02/04/2026
Random thoughts about llms in academia. I think the most risky misconception in this space is not the appeal (or fear) of artificial general intelligence, but rather of "pure" intelligence, i.e. llms are somehow "clean", efficient, verbose, they look like a way to improve practice
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Sami Beaumont @samibeaumont.bsky.social · 18/02/2026
Unsurprisingly we don't read similar opinion pieces about "the right" while the US gouvernement unplugs vaccines research.
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Sami Beaumont @samibeaumont.bsky.social · 10/02/2026
This is a critical point. One could say that inferring what questions are relevant in a clinical examination is just another instance of pattern detection. I believe it misses the core of what clinical skills actually are. In psychiatry the teaching of JP Falret (1874) is still highly relevant
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Mehdi Khamassi @khamascience.bsky.social · 08/02/2026
Ça se passe en direct sous nos yeux. Nous ne pourrons pas dire que nous ne savions pas. www.972mag.com/gaza-foreign...
Screenshot of an article in +972 magazine entitled 'The legal fight to open Gaza to foreign press has failed. It’s time to change course', Feb. 6, 2026.
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Joao Barbosa @jbarbosa.org · 27/01/2026
Postdoc position in Paris: come help develop new generation human brain computer interfaces ⚡🧠💻 Interested? Contact me if you have experience with machine learning (e.g. simulation-based inference, RL, generative/diffusion models) or dynamical systems. See below for + details and retweet 🙏
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Philippe Domenech @philippedomenech.bsky.social · 15/01/2026
🚨 !!! New preprint !!! 🚨 MULTIMODHAL (phase 3, multicenter double-blind RCT): fMRI “symptom-capture”–guided neuronavigation significantly improves 1-Hz rTMS outcomes for drug-resistant auditory verbal hallucinations vs standard T3P3 targeting. 🧠🟦 #rTMS #Psychiatry #Schizophrenia #fMRI
medrxiv.org
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Sami Beaumont @samibeaumont.bsky.social · 06/01/2026
It's either (1) safeguarding llms is not possible and we should a) ask if they are necessary everywhere b) regulate them ; or (2) safeguarding is possible (as llms are marketed) and companies should be accountable for not implementing it correctly. They can't have it both ways.
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David Monniaux @monniauxd.bsky.social · 06/01/2026
Pour bloquer Sci Hub il y a du monde pour bloquer X en revanche..
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Sami Beaumont @samibeaumont.bsky.social · 25/12/2025
While some weird guys decided to out themselves as @irisvanrooij.bsky.social haters (whatever it means), i think it's time to out myself as a longtime fan of her (and colleagues') work. A short thread of my favorites:
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Erik Angner @erikangner.com · 27/11/2025
"Runctitiononal features"? "Medical fymblal"? "1 Tol Line storee"? This gets worse the longer you look at it. But it's got to be good, because it was published in Nature Scientific Reports last week: www.nature.com/articles/s41... h/t @asa.tsbalans.se
Infographic with AI slop published in Nature Scientific Reports
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Berna Devezer @devezer.bsky.social · 21/10/2025
When I bring up the fact that most replications are uninformative and unjustifiable by design, hence we should instead do better research, I always get the same argument back and I'd like to think through this reasoning carefully. It goes like this:
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Phil Corlett @philcorlett.bsky.social · 15/10/2025
Seeing lots of reactions to this compelling paper - showing VTA dopamine is linked to cue and outcome induced behavioral reactions: www.nature.com/articles/s41... I have some thoughts…
nature.com
Dopamine dynamics during stimulus-reward learning in mice can be explained by performance rather than learning - Nature Communications
VTA dopamine activity control movement-related performance, not reward prediction errors. Here, authors show that behavioral changes during Pavlovian learning explain DA activity regardless of reward ...
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Sam Gershman @gershbrain.bsky.social · 14/10/2025
Really interesting work by Bakhurin and colleagues challenging the reward prediction error hypothesis of dopamine: www.nature.com/articles/s41... I love this figure which both echoes and undermines the famous figure from Schultz et al. (1997).
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Nathan Kalman-Lamb @nkalamb.bsky.social · 13/10/2025
Front page of Scottish newspaper The National today.
How Genocide Happened
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Esther Mondragón @e-mondragon.bsky.social · 06/09/2025
I deeply agree with the sentiment of this paper. Although, as a norm, I dislike mixing up "activism" and research, there are occasions in which it is justified. Universities and society are blindly and impositively adopting corporative tools that severely jeopardise our capabilities of reasoning >>
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News Eye @newseye.bsky.social · 21/07/2025
🚨BREAKING: The last journalists working for AFP in Gaza have said they can no longer work for the news agency. They are out of energy and they are starving to death. I have never seen a statement from a news organisation like it. 🧵
Sans intervention immédiate, les derniers reporters de Gaza vont mourir
21 juillet 2025
L'AFP travaille avec une pigiste texte, trois photographes et six pigistes vidéo dans la Bande de Gaza depuis le départ de ses journalistes staff courant 2024.
Avec quelques autres, ils sont aujourd'hui les seuls à rapporter ce qu'il se passe dans la Bande de Gaza. La presse internationale est interdite d'entrer dans ce territoire depuis près de deux ans.
Nous refusons de les voir mourir.
L'un deux, Bashar, collabore pour l'AFP depuis 2010, d'abord comme fixeur, ensuite comme photographe pigiste, et depuis 2024 comme principal photographe.
Samedi 19 juillet, il est parvenu à poster un message sur Facebook: « Je n'ai plus la force de travailler pour les médias.
Mon corps est maigre et je ne peux plus travailler ».
Bashar, 30 ans, travaille et vit dans des conditions égales à celles de tous les Gazaouis, allant d'un camp de réfugiés à un autre camp au gré des bombardements israéliens. Depuis plus d'un an il vit dans le dénuement le plus total et travaille en prenant d'énormes risques pour sa vie. L'hygiène est pour lui un problème majeur, avec des périodes de maladies intestinales sévères.
Bashar vit depuis février dans les ruines de sa maison de Gaza City avec sa mère, ses quatre frères et sœurs et la famille d'un de ses frères. Leur maison est vide de tout aménagement et confort, à part quelques coussins. Dimanche matin, il a rapporté que son frère aîné était « tombé, à cause de la faim ».
Même si ces journalistes reçoivent un salaire mensuel de l'AFP, il n'y a rien à acheter ou alors à des prix totalement exorbitants. Le système bancaire a disparu, et ceux qui pratiquent le change entre les comptes bancaires en ligne et l'argent liquide prennent une commission de près de 40%.
L'AFP n'a plus la possibilité d'avoir un véhicule et encore moins de l'essence pour permettre à ses journalistes de se déplacer pour leurs reportages. Circuler en voiture équivaut de toutes les façons à pre…
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Mel Andrews @bayesianboy.bsky.social · 17/07/2025
The only reason to refer to technology as “AI” is to confuse people. Change my mind.
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Lydia Polgreen @polgreen.bsky.social · 15/07/2025
A powerful essay by @omerbartov.bsky.social that concludes, with care and precision, that Israel is committing genocide against the Palestinian people. Others have reached this conclusion too. Bartov's piece explores some deep and important questions. www.nytimes.com/2025/07/15/o...
nytimes.com
Opinion | I’m a Genocide Scholar. I Know It When I See It.
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Armin Lak @laklab.bsky.social · 11/06/2025
Our work, out at Cell, shows that the brain’s dopamine signals teach each individual a unique learning trajectory. Collaborative experiment-theory effort, led by Sam Liebana in the lab. The first experiment my lab started just shy of 6y ago & v excited to see it out: www.cell.com/cell/fulltex...
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Marlos C. Machado @marloscmachado.bsky.social · 27/05/2025
📢 I'm very excited to release AgarCL, a new evaluation platform for research in continual reinforcement learning‼️ Repo: github.com/machado-rese... Website: agarcl.github.io Preprint: arxiv.org/abs/2505.18347 Details below 👇
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Stefano Palminteri @stepalminteri.bsky.social · 26/05/2025
New in Nature MentalHealth! with Vrizzi, Najar, Lemogne, and @mael-lebreton.bsky.social We tested whether behavioural and RL-based model parameters are test-retest reliable and predict mental health traits. The result? Not really. A cautionary tale for comp. psychiatry doi.org/10.1038/s442...
doi.org
Behavioral, computational and self-reported measures of reward and punishment sensitivity as predictors of mental health characteristics - Nature Mental Health
Reinforcement learning task-based behavioral and computational measures displayed low test–retest reliability at the individual level. Also in contrast to self-assessed personality measures, behaviora...
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Iris van Rooij 💭 @irisvanrooij.bsky.social · 17/05/2025
I am seeing news that AI companies face “unexpected” obstacles in scaling up their AI systems. Not unexpected at all, of course. Completely predictable from the Ingenia theorem.
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Mehdi Khamassi @khamascience.bsky.social · 17/05/2025
Ça se passe en direct sous nos yeux. Nous ne pourrons pas dire que nous ne savions pas. (Pétition à signer) blogs.mediapart.fr/les-invites-...
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Tobias Hauser @tobiasuhauser.bsky.social · 14/05/2025
#OCD is a understudied disorder, meaning that we know way too little about the underlying (brain) processes. We have thus built the Brain Explorer app www.brainexplorer.net where everyone can easily contribute to understanding OCD. #MentalHealthAwareness @tueneurocampus.bsky.social @ucl.ac.uk
brainexplorer.net
Brain Explorer - Test your brain power
The brain explorer app for Apple and Android tests your brain functions and helps researchers to understand the brain. Explore your brain power and how brain functions are important for mental health.
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Mehdi Khamassi @khamascience.bsky.social · 25/04/2025
www.haaretz.com/opinion/edit...
haaretz.com
A West Bank village destroyed | Editorial
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Mehdi Khamassi @khamascience.bsky.social · 25/04/2025
www.haaretz.com/israel-news/...
haaretz.com
Israel preparing to turn Rafah – one-fifth of Gaza – into part of buffer zone
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Mehdi Khamassi @khamascience.bsky.social · 25/04/2025
www.theguardian.com/world/2025/a...
theguardian.com
No plans to allow any aid into Gaza, says Israeli minister
Israel Katz says blocking aid is ‘one of the main pressure levers’ on Hamas while military announces it has turned 30% of Gaza into buffer zone
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Mehdi Khamassi @khamascience.bsky.social · 15/04/2025
Ça se passe en direct sous nos yeux. Nous ne pourrons pas dire que nous ne savions pas.
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Javier Abalos @abalosaurus.bsky.social · 15/11/2024
Excited to share our latest paper on lizard contests and agonistic signals! Read on for a daydream on how being a lizard could be like, disguised as a discussion on the relative impact of static colour patches and behavioral displays in animal contests 🧵 academic.oup.com/beheco/artic...
academic.oup.com
Behavioral threat and appeasement signals take precedence over static colors in lizard contests
Behavioral signals outweigh static color patches in determining the winner of territorial disputes. To understand what limits aggression in wall lizards, w
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Stefano Palminteri @stepalminteri.bsky.social · 14/04/2025
🚨 New study alert! 🚨 Ever wondered if rats and humans learn in the same way? 🐭🧑‍🔬 We tested this — and the answer is yes, at least when it comes to how we value rewards in context. (with @shaunaparkes.bsky.social Lachlan Ferguson, Magdalena Soukupova) 🧵Thread 👇 1/ www.biorxiv.org/content/10.1...
biorxiv.org
Reference Point-Dependent Reinforcement Learning in Humans and Rats
Previous studies indicate that rewards and punishments in reinforcement learning are encoded in a relative manner. Reference point-dependence, a valuation bias shared by eminent adaptation level and p...
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Mehdi Khamassi @khamascience.bsky.social · 11/04/2025
Ça se passe en direct sous nos yeux. Nous ne pourrons pas dire que nous ne savions pas.
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Iris van Rooij 💭 @irisvanrooij.bsky.social · 16/08/2024
🚨Our paper `Reclaiming AI as a theoretical tool for cognitive science' is now forthcoming in the journal Computational Brain & Behaviour. (Preprint: osf.io/preprints/ps...) Below a thread summary 🧵1/n #metatheory #AGI #AIhype #cogsci #theoreticalpsych #criticalAIliteracy
The idea that human cognition is, or can be understood as, a form of computation is a useful conceptual tool for cognitive science. It was a foundational assumption during the birth of cognitive science as a multidisciplinary field, with Artificial Intelligence (AI) as one of its contributing fields. One conception of Al in this context is as a provider of computational tools (frameworks, concepts, formalisms, models, proofs, simulations, etc.) that support theory building in cognitive science. The contemporary field of Al, however, has taken the theoretical possibility of explaining human cognition as a form of computation to imply the practical feasibility of realising human(-like or -level) cognition in factual computational systems; and, the field frames this realisation as a short-term inevitability. Yet, as we formally prove herein, creating systems with human(-like or -level) cognition is intrinsically computationally intractable.
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Olivia Guest · Ολίβια Γκεστ @olivia.science · 01/03/2025
Tired but happy to say this is out w @andreaeyleen.bsky.social: Are Neurocognitive Representations 'Small Cakes'? philsci-archive.pitt.edu/24834/ We analyse cog neuro theories showing how vicious regress, e.g. the homunculus fallacy, is (sadly) alive and well — and importantly how to avoid it. 1/
In order to understand cognition, we often recruit analogies as building blocks of theories to aid us in this quest. One such attempt, originating in folklore and alchemy, is the homunculus: a miniature human who resides in the skull and performs cognition. Perhaps surprisingly, this appears indistinguishable from the implicit proposal of many neurocognitive theories, including that of the 'cognitive map,' which proposes a representational substrate for episodic memories and navigational capacities. In such 'small cakes' cases, neurocognitive representations are assumed to be meaningful and about the world, though it is wholly unclear who is reading them, how they are interpreted, and how they come to mean what they do. We analyze the 'small cakes' problem in neurocognitive theories (including, but not limited to, the cognitive map) and find that such an approach a) causes infinite regress in the explanatory chain, requiring a human-in-the-loop to resolve, and b) results in a computationally inert account of representation, providing neither a function nor a mechanism. We caution against a 'small cakes' theoretical practice across computational cognitive modelling, neuroscience, and artificial intelligence, wherein the scientist inserts their (or other humans') cognition into models because otherwise the models neither perform as advertised, nor mean what they are purported to, without said 'cake insertion.' We argue that the solution is to tease apart explanandum and explanans for a given scientific investigation, with an eye towards avoiding van Rooij's (formal) or Ryle's (informal) infinite regresses.

Figure 1 in https://philsci-archive.pitt.edu/24834/Box 1 in https://philsci-archive.pitt.edu/24834/Box 2 in https://philsci-archive.pitt.edu/24834/
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Sami Beaumont @samibeaumont.bsky.social · 04/04/2025
Excited to share our preprint: "Recasting adaptation as strategy inference". This work explores how humans spontaneously adapt to changes by inferring strategies, rather than relying on incremental learning.@philippedomenech.bsky.social @khamascience.bsky.social @computationalbrain.bsky.social 🧠🟦 🧠🤖
tinyurl.com
Recasting adaptation as strategy inference
Flexible adaptation to uncertain and changing environments requires dynamic adjustments in behavioral strategies. While classical learning theories emphasize incremental strengthening of local stimulu...
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Sami Beaumont @samibeaumont.bsky.social · 03/04/2025
Hello world
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