Reposted by Eghbal HosseiniSandra Romero Pinto @sromeropinto.bsky.social · 25/09/2026Happy 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 14518
Eghbal Hosseini @eghbal-hosseini.bsky.social · 07/07/2026Today 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! 0164
Reposted by Eghbal HosseiniAndrew Lampinen @lampinen.bsky.social · 26/05/2026We'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: 1/5arxiv.orgNaturalistic Computational Cognitive Science: Towards generalizable models and theories that capture the full range of natural behaviorHow 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 ... 13414
Eghbal Hosseini @eghbal-hosseini.bsky.social · 06/05/2026How 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) 28315
Reposted by Eghbal HosseiniAndrew Bahle @andrewbahle.bsky.social · 05/05/2026Our 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)authors.elsevier.comPlease wait whilst we redirect youAll content on this site: Copyright © 2026 Elsevier B.V., its licensors, and contributors. All rights are reserved, including those for text and data mining, AI training, and similar technologies. For all open access content, the relevant licensing terms apply. 3278
Reposted by Eghbal HosseiniSam Gershman @gershbrain.bsky.social · 17/04/2026To 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. 419057
Reposted by Eghbal HosseiniAndrew Lampinen @lampinen.bsky.social · 03/04/2026When 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.orgImproving Latent Generalization Using Test-time ComputeLanguage 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... 1257
Reposted by Eghbal HosseiniAndrew Lampinen @lampinen.bsky.social · 17/03/2026Pleased 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.orgRepresentation Biases: Variance Is Not Always a Good Proxy for ImportanceA 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... 17229
Eghbal Hosseini @eghbal-hosseini.bsky.social · 13/03/2026Excited 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. 🧵👇 191
Reposted by Eghbal HosseiniAndrew Lampinen @lampinen.bsky.social · 29/01/2026New 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/ 1718
Reposted by Eghbal HosseiniDeclan Campbell @thisisadax.bsky.social · 05/02/2026The 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. 🧵👇 18326
Eghbal Hosseini @eghbal-hosseini.bsky.social · 04/02/2026How 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/ 13911
Eghbal Hosseini @eghbal-hosseini.bsky.social · 30/01/2026Really 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 :) 082
Eghbal Hosseini @eghbal-hosseini.bsky.social · 09/01/2026The wait is over! I am so excited to start over and re-learn the foundations from @gershbrain.bsky.social :) 050
Reposted by Eghbal HosseiniAndrew Bahle @andrewbahle.bsky.social · 18/11/2025Presenting this afternoon from 1-5pm! 162
Reposted by Eghbal HosseiniUniReps @unireps.bsky.social · 17/11/2025The 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.netNeurIPS 2025 Workshop UniRepsWelcome to the OpenReview homepage for NeurIPS 2025 Workshop UniReps 083
Reposted by Eghbal HosseiniVivian 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 35042
Reposted by Eghbal HosseiniNancy Kanwisher @nancykanwisher.bsky.social · 17/11/2025This 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. 0103
Reposted by Eghbal HosseiniAndrew Bahle @andrewbahle.bsky.social · 15/11/2025LLMs 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 46318
Reposted by Eghbal HosseiniAndrew Bahle @andrewbahle.bsky.social · 17/10/2025Wow what a nice picture I wonder who took it :) 0102
Reposted by Eghbal HosseiniReza Shadmehr @rezashadmehr.bsky.social · 22/05/2025Neuronal 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.orgA vector calculus for neural computation in the cerebellumNull 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... 510935
Reposted by Eghbal HosseiniCogCompNeuro @cogcompneuro.bsky.social · 19/05/2025A 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.orgSchedule of Events 0127
Reposted by Eghbal HosseiniColton Casto @coltoncasto.bsky.social · 21/04/2025New 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.orgThe cerebellar components of the human language networkThe 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... 24918
Reposted by Eghbal HosseiniDavid 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.orgjtnworkshop2025.flatironinstitute.orgJTN - 2025JTN - 2025 02116
Eghbal Hosseini @eghbal-hosseini.bsky.social · 26/03/2025I couldn’t recommend a better place to learn and work if you’re considering neuroscience grad school and want to interact with phenomenal scientists! 020
Reposted by Eghbal HosseiniEv Fedorenko @evfedorenko.bsky.social · 18/03/2025So 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.eduTo the brain, Esperanto and Klingon appear the same as English or MandarinMIT 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... 05418
Eghbal Hosseini @eghbal-hosseini.bsky.social · 15/03/2025Very 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 030
Reposted by Eghbal HosseiniCory 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.orgConstructions are Revealed in Word DistributionsConstruction grammar posits that constructions (form-meaning pairings) are acquired through experience with language (the distributional learning hypothesis). But how much information about… 23610
Reposted by Eghbal HosseiniAran Nayebi @anayebi.bsky.social · 25/02/2025What 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. 33913
Reposted by Eghbal HosseiniThe Transmitter @thetransmitter.bsky.social · 24/02/2025Many 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.orgBreaking the barrier between theorists and experimentalistsMany neuroscience students are steeped in an experiment-first style of thinking. Let’s not forget how theory can guide experiments. 413455
Reposted by Eghbal HosseiniNature @nature.com · 06/02/2025Nature research paper: Children’s arithmetic skills do not transfer between applied and academic mathematics go.nature.com/40PT3pTgo.nature.comChildren’s arithmetic skills do not transfer between applied and academic mathematics - NatureChildren 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. 38026
Reposted by Eghbal HosseiniGatsby 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 0135
Reposted by Eghbal HosseiniErin Grant @eringrant.me · 16/01/2025Our 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 0209
Reposted by Eghbal HosseiniJoao Barbosa @jbarbosa.org · 12/01/2025Check 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 310337
Eghbal Hosseini @eghbal-hosseini.bsky.social · 27/12/2024Why 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/yckndmjttinyurl.comUniversality of representation in biological and artificial neural networksMany 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... 210827
Reposted by Eghbal HosseiniJosh McDermott @joshhmcdermott.bsky.social · 13/12/2024New 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.comModels optimized for real-world tasks reveal the task-dependent necessity of precise temporal coding in hearing - Nature CommunicationsEars 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... 211332