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Eghbal Hosseini

@eghbal-hosseini.bsky.social
299 followers 345 following 44 posts

Visiting researcher at Google DeepMind, PhD in computational neuroscience @MIT with @evfedorenko.bsky.social eghbalhosseini.github.io

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Reposted by Eghbal Hosseini
Sandra Romero Pinto @sromeropinto.bsky.social · 25/09/2026
Happy to have this finally out! TL;DR: The evolution of beliefs over time can be formulated as a dynamical system, and OFC neural activity appears to implement this system with its own dynamics. These emerge without explicit supervision—when animals learn to predict value in simple Pavlovian tasks
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Eghbal Hosseini @eghbal-hosseini.bsky.social · 07/07/2026
Today at ICML2026, Jack King presents our work with @evfedorenko.bsky.social, linking internal representation trajectories to LLM behavior. 📄 Representational Curvature Modulates Behavioral Uncertainty in LLMs 🔗https://arxiv.org/abs/2604.23985 📍Hall A #1903 | ⏰ 10:30a-12:15p KST Come say hi!
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Andrew Lampinen @lampinen.bsky.social · 26/05/2026
We've updated the preprint of our Naturalistic Computational Cognitive Science paper (arxiv.org/abs/2502.20349) — we've tried to clarify and streamline the arguments, and added some new examples: 1/5
arxiv.org
Naturalistic Computational Cognitive Science: Towards generalizable models and theories that capture the full range of natural behavior
How can cognitive science build generalizable theories that span the full scope of natural situations and behaviors? We argue that progress in Artificial Intelligence (AI) offers timely opportunities ...
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Eghbal Hosseini @eghbal-hosseini.bsky.social · 06/05/2026
How is uncertainty in LLMs output reflected in internal representations? In our new work (to appear at ICML 2026), we show that the shape of internal token trajectories provides a direct geometric link to behavioral uncertainty (output entropy). 🧵(1/n)
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Andrew Bahle @andrewbahle.bsky.social · 05/05/2026
Our piece on language-like properties in animal vocal behavior is available today. Check it out! This is an incredibly difficult and thorny topic which is nonetheless of supreme importance and interest imco (in my current opinion)
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Sam Gershman @gershbrain.bsky.social · 17/04/2026
To accompany my textbook (Computational Foundations of Cognitive Neuroscience) and the class I taught this semester, I'm open-sourcing my lectures slides: gershmanlab.com/lectures.html I'll continue to update these as I improve them.
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Andrew Lampinen @lampinen.bsky.social · 03/04/2026
When and how can test-time thinking allow models to use information latent in their training data? What are the benefits and tradeoffs relative to other solutions like synthetic data augmentation? Pleased to share (after a long delay) an exploration of these issues: arxiv.org/abs/2604.01430 thread:
arxiv.org
Improving Latent Generalization Using Test-time Compute
Language Models (LMs) exhibit two distinct mechanisms for knowledge acquisition: in-weights learning (i.e., encoding information within the model weights) and in-context learning (ICL). Although these...
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Andrew Lampinen @lampinen.bsky.social · 17/03/2026
Pleased to share that our paper "Representation Biases: Variance is Not Always a Good Proxy for Importance" is now out as Theory/New Concepts paper in eNeuro! www.eneuro.org/content/13/3... 1/
eneuro.org
Representation Biases: Variance Is Not Always a Good Proxy for Importance
A central approach in neuroscience is to analyze neural representations as a means to understand a system's function, through the use of methods like principal component analysis, regression, and repr...
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Eghbal Hosseini @eghbal-hosseini.bsky.social · 13/03/2026
Excited to share these two works at @cosynemeeting.bsky.social ! On Friday, Jack King presents his work on "Representational curvature shapes uncertainty in large language models." 📍 Poster 2-223 Done in collaboration with @evfedorenko.bsky.social. 🧵👇
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Andrew Lampinen @lampinen.bsky.social · 29/01/2026
New paper! In arxiv.org/abs/2601.20834 we study how language models representations of things like factuality evolve over a conversation. We find that in edge case conversations, e.g. about model consciousness or delusional content, model representations can change dramatically! 1/
Representations in language models can change dramatically over a conversation. Conceptual overview: left is a stimulated conversation between a user and a model, right is a plot of the models linear representations of factuality of answers to questions like "do you have qualia" over the conversation — the answers that start factual flip over the conversation to non-factual, and vice versa.
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Declan Campbell @thisisadax.bsky.social · 05/02/2026
The visual world is composed of objects, and those objects are composed of features. But do VLMs exploit this compositional structure when processing multi-object scenes? In our 🆒🆕 #ICLR2026 paper, we find they do – via emergent symbolic mechanisms for visual binding. 🧵👇
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Eghbal Hosseini @eghbal-hosseini.bsky.social · 04/02/2026
How do diverse context structures reshape representations in LLMs? In our new work, we explore this via representational straightening. We found LLMs are like a Swiss Army knife: they select different computational mechanisms reflected in different representational structures. 1/
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Eghbal Hosseini @eghbal-hosseini.bsky.social · 30/01/2026
Really excited about this work by @lampinen.bsky.social and the team! Being a small part of this work, I learned a lot about representation drift during in-context learning, role-play, and the challenges of a static view on interpretability. Highly recommend it :)
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Eghbal Hosseini @eghbal-hosseini.bsky.social · 09/01/2026
The wait is over! I am so excited to start over and re-learn the foundations from @gershbrain.bsky.social :)
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Andrew Bahle @andrewbahle.bsky.social · 18/11/2025
Presenting this afternoon from 1-5pm!
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UniReps @unireps.bsky.social · 17/11/2025
The UniReps Workshop accepted papers are out! 🎉 Huge thanks to the authors, reviewers, and incredible AC committee for their dedication and effort in making this happen. 🙏 openreview.net/group?id=Neu...
openreview.net
NeurIPS 2025 Workshop UniReps
Welcome to the OpenReview homepage for NeurIPS 2025 Workshop UniReps
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Vivian Paulun @vivianpaulun.bsky.social · 17/11/2025
🚨I am looking for a POSTDOC, LAB MANAGER/TECH and GRAD STUDENTS to join my new lab in beautiful Madison, WI. We study how our brains perceive and represent the physical world around us using behavioral, computational, and neuroimaging methods. paulunlab.psych.wisc.edu #VisionScience #NeuroSkyence
Skyline of Madison, WI
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Nancy Kanwisher @nancykanwisher.bsky.social · 17/11/2025
This is an amazing opportunity: work with Vivian Paulun ‪@vivianpaulun.bsky.social‬, who has deep insights about perception, and extraordinary skills as an experimentalist and theorist.
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Andrew Bahle @andrewbahle.bsky.social · 15/11/2025
LLMs get a lot of attention but if you are interested in the original (allegedly) stochastic parrots come to my poster Tuesday where I will present new work on the natural vocal behavior or parrots and its cortical control #Sfn2025 #SfN25
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Andrew Bahle @andrewbahle.bsky.social · 17/10/2025
Wow what a nice picture I wonder who took it :)
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Reza Shadmehr @rezashadmehr.bsky.social · 22/05/2025
Neuronal computation in the cerebellum via a vector calculus. Work of Mohammad Amin Fakharian, Alden Shoup, Paul Hage, and Hisham Elseweifi www.science.org/doi/10.1126/...
science.org
A vector calculus for neural computation in the cerebellum
Null space theory predicts that neurons generate spikes not only to produce behavior but also to prevent the undesirable effect of other neurons on behavior. In this work, we show that this competitiv...
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CogCompNeuro @cogcompneuro.bsky.social · 19/05/2025
A detailed schedule for CCN2025 is available on our website now, including the specific keynotes / GACs / community events taking place: 2025.ccneuro.org/schedule-of-... The early bird registration deadline is coming up this Friday (23rd May)!
2025.ccneuro.org
Schedule of Events
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Colton Casto @coltoncasto.bsky.social · 21/04/2025
New paper! 🧠 **The cerebellar components of the human language network** with: @hsmall.bsky.social @moshepoliak.bsky.social @gretatuckute.bsky.social @benlipkin.bsky.social @awolna.bsky.social @aniladmello.bsky.social and @evfedorenko.bsky.social www.biorxiv.org/content/10.1... 1/n 🧵
biorxiv.org
The cerebellar components of the human language network
The cerebellum's capacity for neural computation is arguably unmatched. Yet despite evidence of cerebellar contributions to cognition, including language, its precise role remains debated. Here, we sy...
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David Lipshutz @lipshutz.bsky.social · 09/04/2025
📣 Grad students and postdocs in computational and theoretical neuroscience: please consider applying for the 2025 Flatiron Institute Junior Theoretical Neuroscience Workshop! All expenses are covered. Apply by April 14. jtnworkshop2025.flatironinstitute.org
jtnworkshop2025.flatironinstitute.org
JTN - 2025
JTN - 2025
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Eghbal Hosseini @eghbal-hosseini.bsky.social · 26/03/2025
I couldn’t recommend a better place to learn and work if you’re considering neuroscience grad school and want to interact with phenomenal scientists!
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Ev Fedorenko @evfedorenko.bsky.social · 18/03/2025
So excited to have our work on conlangs out in PNAS: www.pnas.org/doi/10.1073/... Congrats, Saima, Maya, and the rest of the crew -- well done! Here is the MIT news story: news.mit.edu/2025/esperan...
news.mit.edu
To the brain, Esperanto and Klingon appear the same as English or Mandarin
MIT research finds the brain’s language-processing network also responds to artificial languages such as Esperanto and languages made for TV, such as Klingon on “Star Trek” and High Valyrian and Dothr...
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Eghbal Hosseini @eghbal-hosseini.bsky.social · 15/03/2025
Very important work by @rarefin.bsky.social, Oscar Skean, @yann-lecun.bsky.social and @shwartzzzivravid.bsky.social on richness of information content in intermediate layers in LLMs. highly recommended
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Cory Shain @coryshain.bsky.social · 11/03/2025
🚨 First preprint from the lab! 🚨 Josh Rozner (w/@weissweiler.bsky.social and @kmahowald.bsky.social) uses counterfactual experiments on LMs to show that word distributions can provide a learning signal for diverse syntactic constructions, including some hard cases.
arxiv.org
Constructions are Revealed in Word Distributions
Construction grammar posits that constructions (form-meaning pairings) are acquired through experience with language (the distributional learning hypothesis). But how much information about…
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Aran Nayebi @anayebi.bsky.social · 25/02/2025
What should count as a good model of intelligence? AI is advancing rapidly, but how do we know if it captures intelligence in a scientifically meaningful way? We propose the *NeuroAI Turing Test*—a benchmark that evaluates models based on both behavior and internal representations.
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The Transmitter @thetransmitter.bsky.social · 24/02/2025
Many neuroscience students are steeped in an experiment-first style of thinking that leads to “random walk science.” Let’s not forget how theory can guide experiments towards deeper insights, writes @gershbrain.bsky.social. #neuroskyence www.thetransmitter.org/theoretical-...
thetransmitter.org
Breaking the barrier between theorists and experimentalists
Many neuroscience students are steeped in an experiment-first style of thinking. Let’s not forget how theory can guide experiments.
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Nature @nature.com · 06/02/2025
Nature research paper: Children’s arithmetic skills do not transfer between applied and academic mathematics go.nature.com/40PT3pT
go.nature.com
Children’s arithmetic skills do not transfer between applied and academic mathematics - Nature
Children who learn maths working in markets and children who learn maths only from school were both unable to transfer their skills to new contexts, highlighting a need to reconsider how maths is taught in school.
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Gatsby Computational Neuroscience Unit @gatsbyucl.bsky.social · 05/02/2025
📢 Applications are open for 2025 Analytical Connectionism! Topical focus: bias in learning Learn key connectionist models & analytical tools for neural-network analysis, and work on novel projects with faculty & postdoc mentors ⏰ Apply by 18 April ℹ️ www.analytical-connectionism.net/school/2025
2025 School on Analytical Connectionism (25 Aug -  5 Sep, London). 
Apply by April 18, 2025.

Learn about techniques to analyse neural networks and to develop connectionist theories of higher-level cognition; interact with leading researchers in neuroscience, psychology and machine learning.

Supported by the Gatsby Unit and SWC.
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Erin Grant @eringrant.me · 16/01/2025
Our representational alignment workshop returns to #ICLR2025! Submit your work on how ML/cogsci/neuro systems represent the world & what shapes these representations 💭🧠🤖 w/ @thisismyhat.bsky.social @dotadotadota.bsky.social, @sucholutsky.bsky.social @lukasmut.bsky.social @siddsuresh97.bsky.social
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Joao Barbosa @jbarbosa.org · 12/01/2025
Check our latest in which we leverage shape metrics to compare neural geometry across regions, sessions or subjects and how their differences predict behavior. w/ Nejatbakhsh, Duong, @sarah-harvey.bsky.social, Brincat, @siegellab.bsky.social, @earlkmiller.bsky.social & @itsneuronal.bsky.social
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Eghbal Hosseini @eghbal-hosseini.bsky.social · 27/12/2024
Why do diverse ANNs resemble brain representations? Check out our new paper with Colton Casto, @nogazs.bsky.social , Colin Conwell, Mark Richardson, & @evfedorenko.bsky.social on “Universality of representation in biological and artificial neural networks.” 🧠🤖 tinyurl.com/yckndmjt
tinyurl.com
Universality of representation in biological and artificial neural networks
Many artificial neural networks (ANNs) trained with ecologically plausible objectives on naturalistic data align with behavior and neural representations in biological systems. Here, we show that this...
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Josh McDermott @joshhmcdermott.bsky.social · 13/12/2024
New paper from our lab, by Mark Saddler, using machine learning to test the role of temporal coding in hearing. Here is a quick summary. (1/n) www.nature.com/articles/s41...
nature.com
Models optimized for real-world tasks reveal the task-dependent necessity of precise temporal coding in hearing - Nature Communications
Ears encode sound with precisely timed spikes, but the perceptual role of this temporal coding remains uncertain. Here, the authors report that high-fidelity temporal coding is necessary for neural ne...
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