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Ali Mahmoodi

@alimahmoodi.bsky.social
108 followers 67 following 20 posts

Neuroscientist in Oxford, interested in learning and decision making. Former engineer, reader, patzer.

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Reposted by Ali Mahmoodi
Kayson Fakhar @kayson.bsky.social · 02/09/2026
🚨 8 months after, this paper found its home at Science Advances. We came up with a generative brain network model based on game theory and found that the human brain is suboptimal both in terms of wiring cost and communication efficiency. Here's why: www.science.org/doi/10.1126/...
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Sev Harootonian @harootonian.bsky.social · 26/08/2026
My main PhD paper is finally out in Nature Human Behaviour! The question: what cognitive strategies do people use when they teach, and can we nudge them toward a better one? Work with my PhD mentors @yaelniv.bsky.social, @markkho.bsky.social and @cocoscilab.bsky.social. 1/5
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Payam Piray @payampiray.bsky.social · 28/08/2026
I am happy to share some good news: my lab has received an NSF CAREER award and an NIH R01 this summer, supporting our work on how the brain handles uncertainty during learning. We will be hiring postdocs and PhD students in the coming year, so please get by email in touch if you are interested.
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Roxana Zeraati @roxana-zeraati.bsky.social · 07/07/2026
Our paper "Neural timescales from a computational perspective" is finally out in @natneuro.nature.com: www.nature.com/articles/s41... We discuss how computational models and methods can distill empirical observations on neural timescales into quantitative, testable theories of brain computation.
nature.com
Neural timescales from a computational perspective - Nature Neuroscience
This review integrates computational approaches to provide a unified view on how data analysis methods, biophysical mechanistic models and machine learning approaches can help to uncover the origins a...
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Alon Baram @alonbaram.bsky.social · 29/06/2026
How does the human brain extract abstract structure from experience? We show that sensory-independent relational representations emerge in mPFC over several days. Work with @mgarvert.bsky.social and @behrenstimb.bsky.social now out in @currentbiology.bsky.social: www.cell.com/current-biol...
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Thomas Akam @thomasakam.bsky.social · 15/06/2026
Why does dopamine ramp up during approach to predictable rewards? In this preprint with Luke Priestley, we explore the idea that dopamine ramps occur when reward predictions inferred using a world-model are used to train striatal cached values.
biorxiv.org
Dopamine ramps as a normative consequence of dual-process control
Midbrain dopamine neurons are thought to implement a temporal difference (TD) reward prediction error (RPE) that updates cached values stored in striatum. This has been challenged by evidence that dop...
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Reposted by Ali Mahmoodi
peterdoohan.bsky.social @peterdoohan.bsky.social · 11/06/2026
How do brains plan actions towards goals? To get at this question we studied mice navigating complex mazes as goals changed on every trial 🧵 Work with @thomasakam.bsky.social @behrenstimb.bsky.social @kristorpjensen.bsky.social now on BioRxiv: www.biorxiv.org/content/10.6...
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Thomas Akam @thomasakam.bsky.social · 11/06/2026
This project builds on work establishing the behaviour done at Champalimaud in Lisbon with @michaelfsp.bsky.social, Beatriz Godinho, Christian Machens, and @ruimcosta.bsky.social : www.biorxiv.org/content/10.6...
biorxiv.org
Flexible route planning and rapid structure learning by mice in complex environments
Action selection using predictive models of the environment plays a fundamental role in human and animal behaviour, yet is poorly understood at circuit and algorithmic levels. Spatial navigation is an...
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Shervin Safavi @neuroprinciplist.bsky.social · 09/06/2026
1/11 Happy to share our TICS paper on using the flexibility of one of the most basic cognitive functions, perception, to understand one of the most complex cognitive dysfunctions, psychiatric conditions (also my first formal work in computational psychiatry 🎉) 📄: www.cell.com/trends/cogni... 🧵 : 👇
cell.com
Perceptual multistability: a multifaceted window into brain dysfunctions
Perceptual multistability, observed across species and sensory modalities, offers valuable insights into numerous cognitive functions and dysfunctions. For instance, differences in temporal dynamics a...
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Ali Mahmoodi @alimahmoodi.bsky.social · 04/06/2026
Looking forward to it!
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Reposted by Ali Mahmoodi
Deng Pan @dengpan.bsky.social · 15/05/2026
My undergraduate thesis, "Distinct patterns of social contagion under risk and ambiguity", is now published online at @commspsychol.nature.com Deeply grateful for the guidance and constant support of Dr. Qingtian Mi, Prof. Jian Li, and Prof. Lusha Zhu.
Two experiments show that observing others shifts both risk and ambiguity preferences. Risk contagion is asymmetric, with stronger alignment toward risk-averse others, whereas ambiguity contagion is more symmetric.
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Marcelo Mattar @marcelomattar.bsky.social · 21/04/2026
New Annual Review with @nathanieldaw.bsky.social: “Planning in the Brain: It's Not What You Think It Is.” We argue that the brain's 'planning' machinery is mostly used for learning from simulated experience, and that thinking prospectively at decision time is just one special case of this process.
annualreviews.org
Planning in the Brain: It's Not What You Think It Is
The neuroscience of planning has long been analogized to search algorithms in artificial intelligence (AI), which simulate future actions to guide immediate choices. We argue that advances in both neu...
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Kai Sandbrink @ackaisa.bsky.social · 26/03/2026
Excited that my paper on metacontrol in humans and neural networks with @summerfieldlab.bsky.social and @lhuntneuro.bsky.social is out in PNAS! We examine the way that predictive representations of control enable behavioral adaptation across settings, and pathologies: www.pnas.org/doi/10.1073/...
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Devika Narain @neuronarain.bsky.social · 14/04/2026
Our work on how neural circuits in the cerebellum encode prior probabilities led by Julius Koppen is out now in Nature Neuroscience www.nature.com/articles/s41... Big thanks to Julius Koppen & the whole team! And dedicated to all of us who found inspiration in Bayesian theories of the brain!
nature.com
Neural circuits encode prior knowledge of temporal statistics - Nature Neuroscience
This study shows that cerebellar circuits learn and encode prior probabilities of event timing. Cell-type-specific neural activity reflects environmental statistics and guides predictive motor behavio...
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Nature Reviews Neuroscience @natrevneuro.nature.com · 13/04/2026
Categorization is ‘baked’ into the brain — a Perspective by Lisa Feldman Barrett & Earl K. Miller @lisafeldmanbarrett.com @earlkmiller.bsky.social #neuroscience #neuroskyence www.nature.com/articles/s41...
nature.com
Categorization is ‘baked’ into the brain - Nature Reviews Neuroscience
Categorization, the grouping of objects, living organisms, actions or events into equivalence clusters, is fundamental to adaptive behaviour. In this Perspective, Barrett and Miller discuss evidence t...
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Marcel S. Kehl @mskehl.bsky.social · 31/03/2026
🔔PREPRINT: Sleep ripples drive single-neuron reactivation for human memory consolidation 1/9: How does sleep support human memory consolidation? To test this, we recorded hundreds of neurons in the human medial temporal lobe (MTL) across learning, wakefulness, and sleep. doi.org/10.64898/202...
doi.org
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Lennart Verhagen 🧠 @lennartverhagen.bsky.social · 26/03/2026
Using non-invasive ultrasonic neuromodulation to boost threat extinction. Finally able to causally unravel amygdala computations in healthy humans. I’ve been dreaming about these capabilities for years and it still feels magical. Pinch me, I can hardly believe how strong these effects are.
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Nature Reviews Neuroscience @natrevneuro.nature.com · 20/03/2026
Clarifying the conceptual dimensions of representation in neuroscience — a Perspective by Stephan Pohl, Edgar Y. Walker, David L. Barack, Jennifer Lee, Rachel N. Denison, Ned Block, Florent Meyniel & Wei Ji Ma www.nature.com/articles/s41...
nature.com
Clarifying the conceptual dimensions of representation in neuroscience - Nature Reviews Neuroscience
Appeals to representation are widespread, despite neuroscientists’ uncertainty about what kind of findings count as evidence for such claims. In this Perspective, Pohl and colleagues develop a unified...
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Roozbeh Kiani @roozbehkiani.bsky.social · 16/03/2026
To accommodate applicants and PIs attending Cosyne, we’ve extended the MCN application deadline to Sunday, Mar 22. Please repost.
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Caroline Nettekoven @carobellum.bsky.social · 10/03/2026
Check out our new preprint! We directly tested a common assumption in neuroimaging: Is resting-state the best estimate of intrinsic organization? Spoiler: Across datasets and brain systems, multi-task fMRI did better. 👇
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Ali Mahmoodi @alimahmoodi.bsky.social · 16/02/2026
We review studies showing that when brain areas face similar computational demands in social and non-social context, they perform the same computations. We argue that exaptation (repurposing of traits for new functions) played a key role in brain evolution.
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Ali Mahmoodi @alimahmoodi.bsky.social · 15/02/2026
Amazing work.
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Ali Mahmoodi @alimahmoodi.bsky.social · 11/02/2026
Neural population geometry and optimal coding of tasks with shared latent structure www.nature.com/articles/s41...
nature.com
Neural population geometry and optimal coding of tasks with shared latent structure - Nature Neuroscience
The authors analytically determine how neuronal correlations and geometry collectively determine readout generalization across tasks and show how these geometric features follow distinct trajectories ...
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Reposted by Ali Mahmoodi
Stefano Palminteri @stepalminteri.bsky.social · 27/01/2026
🧵 New paper in @NatureComms Feedback-induced attitudinal changes in risk preferences Nasioulas, Potier, Cerrotti, Lebreton & me (2026) Does feedback really improve risky decision-making? Short answer: no! it changes attitudes, not learning. 👇 rdcu.be/e0VcO
rdcu.be
Feedback-induced attitudinal changes in risk preferences
Nature Communications - Normative theory predicts that feedback should not affect decisions under risk, but past findings disagree. Here, the authors show that feedback shifts risk-taking by...
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Arman Behrad @armanbehrad.bsky.social · 08/01/2026
Wanna compare dynamics across neural data, RNNs, or dynamical systems? We got a fast and furious method🏎️ The 1st preprint of my PhD 🥳 fast dynamical similarity analysis (fastDSA): 📜: arxiv.org/abs/2511.22828 💻: github.com/CMC-lab/fast... I’ll be @cosynemeeting.bsky.social - happy to chat 😉
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Ali Mahmoodi @alimahmoodi.bsky.social · 07/01/2026
Better artificial intelligence does not mean better models of biology. www.sciencedirect.com/science/arti...
sciencedirect.com
Better artificial intelligence does not mean better models of biology
Deep neural networks (DNNs) once showed increasing alignment with primate perception as they improved on vision benchmarks, raising hopes that advance…
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Reposted by Ali Mahmoodi
Kayson Fakhar @kayson.bsky.social · 15/12/2025
🚨new work with the dream team @danakarca.bsky.social @loopyluppi.bsky.social @fatemehhadaeghi.bsky.social @stuartoldham.bsky.social @duncanastle.bsky.social We use game theory and show the brain is not optimally wired for communication and there’s more to its story: www.biorxiv.org/content/10.6...
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Ali Mahmoodi @alimahmoodi.bsky.social · 28/11/2025
Building compositional tasks with shared neural subspaces www.nature.com/articles/s41...
nature.com
Building compositional tasks with shared neural subspaces - Nature
The brain can flexibly perform multiple tasks by compositionally combining task-relevant neural representations.
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Ali Mahmoodi @alimahmoodi.bsky.social · 28/11/2025
Exciting research position in Germany (Freiburg) with Carsten Mehring uni-freiburg.de/en/job/00004.... Carsten was my PhD supervisor. He is of the best scientists I have seen.
uni-freiburg.de
University of Freiburg
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Stefano Palminteri @stepalminteri.bsky.social · 26/11/2025
🚨Friends, we’re happy to share that our book is available for pre-order! 🎉 We aimed to cover all the foundations of the topic in an accessible manner for a large audience. It could help set up a bachelor-level curriculum on the topic. Pre-orders are very key for the fate of books: shorturl.at/Dxbif
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Payam Piray @payampiray.bsky.social · 17/11/2025
Happy to share my new paper published in @nathumbehav.nature.com: A critical look at statistical power in computational modeling studies, particularly those based on model selection. www.nature.com/articles/s41...
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Mohamady El-Gaby @melgaby.bsky.social · 14/11/2025
Come find out all about cognitive maps in the PFC!!
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sankalpgarud.bsky.social @sankalpgarud.bsky.social · 14/10/2025
How do we decide to reach out and make friends? My PhD work on this question is out today in @pnas.org 🎉 Study done in collaboration with the incredible @mirunarascu.bsky.social, @sorcha-hamilton.bsky.social, Ingrid Yu, and my two amazing supervisors, Matthew Rushworth and @mkflugge.bsky.social👇
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Ali Mahmoodi @alimahmoodi.bsky.social · 04/09/2025
Brain-wide representations of prior information in mouse decision-making www.nature.com/articles/s41...
nature.com
Brain-wide representations of prior information in mouse decision-making - Nature
Brain-wide recordings in mice reveal that prior expectations are distributed through recurrent loops across all levels of cortical and subcortical processing.
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Stefano Palminteri @stepalminteri.bsky.social · 03/09/2025
New paper our in @pnas.org, lead by @isabellehoxha.bsky.social with Léo Sperber. We use evolutionary simulation to assess and compare the adaptive value of positivity bias and gradual perseveration in reinforcement learning. Follow the thread below (and Isabelle!) for more details!
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Ali Mahmoodi @alimahmoodi.bsky.social · 28/08/2025
I’m glad to have played a small part in this project, where the brilliant Deng Pan combined modelling, fMRI and ultrasound stimulation to demonstrate the causal role of the hippocampus in learning based on inference. See Deng's thread below
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Miriam Klein-Flügge 🧠 @mkflugge.bsky.social · 20/08/2025
We are super excited about the first human transcranial ultrasound study from our lab which is now on BiorXiv, showing the amygdala‘s role in processing ambiguous emotions and showing TUS changed resting-state connectivity and metabolite concentrations (GABA) in the amygdala - a huge team effort! 🥳🙏🏼
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Payam Piray @payampiray.bsky.social · 12/08/2025
New paper with @nathanieldaw.bsky.social in Nature Communications: an RL model that builds a successor map compositionally. The new model plans as well as the best models, and it links components of the map used for planning to neural codes in the medial entorhinal cortex. rdcu.be/eAofi
rdcu.be
Reconciling flexibility and efficiency: medial entorhinal cortex represents a compositional cognitive map
Nature Communications - How the brain creates compositional cognitive maps that support both flexible and efficient planning remains poorly understood. Here, authors propose a...
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Marco K Wittmann @mkwittmann.bsky.social · 07/08/2025
📢 Job announcement: Two (!) 3-year postdoc jobs in our lab at UCL 📢 🧠💫🔊 We are looking for postdocs interested in the abstract mechanisms underlying social cognition. Modelling, fMRI and non-invasive ultrasound, a new deep-brain stimulation method. Please RT www.ucl.ac.uk/work-at-ucl/...
ucl.ac.uk
UCL – University College London
UCL is consistently ranked as one of the top ten universities in the world (QS World University Rankings 2010-2022) and is No.2 in the UK for research power (Research Excellence Framework 2021).
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Ali Mahmoodi @alimahmoodi.bsky.social · 05/08/2025
Individual differences in decision-making shape how mesolimbic dopamine regulates choice confidence and change-of-mind www.nature.com/articles/s41...
nature.com
Individual differences in decision-making shape how mesolimbic dopamine regulates choice confidence and change-of-mind - Nature Neuroscience
Differences in neuroeconomic decision-making influence nucleus accumbens dopamine dynamics and reflect choice confidence during evaluation, as well as past and future value during re-evaluation, which...
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Ali Mahmoodi @alimahmoodi.bsky.social · 29/07/2025
This is cool!
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Seongmin Park @seongminpark.bsky.social · 10/07/2025
🚨 We’re hiring! The Computational Cognitive Neuroscience Lab at Virginia Tech is looking for a postdoc to join our team studying the neural + computational mechanisms of structure learning and flexible cognition: ccnvt.github.io#positions
ccnvt.github.io
CCN Lab
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Ali Mahmoodi @alimahmoodi.bsky.social · 09/07/2025
We have a Research Assistant position available in Rushworth Lab to help us with projects involving fMRI, TMS, and TUS. Find out more here my.corehr.com/pls/uoxrecru...
my.corehr.com
Job Details
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Nina Rouhani @ninarouhani.bsky.social · 29/05/2025
new paper from a collaborative endeavor! (@co0p3r.bsky.social) we find & replicate food-reward biases in a reinforcement learning task (where food stim are incidental) people with eating disorder symptoms show a low-calorie food bias while those without show a high-calorie food bias... (1/3)
nature.com
Eating disorder symptoms and emotional arousal modulate food biases during reward learning in females - Nature Communications
Disordered eating can disrupt the rewarding value of food. Here, the authors show in a female sample that eating disorder symptoms, emotional arousal, and interoceptive awareness modulate goal-ir...
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Mohamady El-Gaby @melgaby.bsky.social · 28/05/2025
Completing the mouse, ANN, human trilogy of projects, here are two openings to study cognitive map deficits in human psychosis patients with the inimitable @mattnour.bsky.social Using functional neuroimaging and planning tasks. If you’re keen to join us then apply!
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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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Sev Harootonian @harootonian.bsky.social · 19/05/2025
🚨 New preprint alert! 🚨 Thrilled to share new research on teaching! Work supervised by @cocoscilab.bsky.social, @yaelniv.bsky.social, and @markkho.bsky.social. This project asks: When do people teach by mentalizing vs with heuristics? 1/3 osf.io/preprints/os...
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Ali Mahmoodi @alimahmoodi.bsky.social · 30/04/2025
Humans learn generalizable representations through efficient coding www.nature.com/articles/s41...
nature.com
Humans learn generalizable representations through efficient coding - Nature Communications
Reinforcement learning models of human behavior are limited in explaining the capacity for generalization. Here, the authors propose an efficient coding principle for reinforcement learning, whereby a...
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Ali Mahmoodi @alimahmoodi.bsky.social · 15/04/2025
Hippocampal output suppresses orbitofrontal cortex schema cell formation www.nature.com/articles/s41...
nature.com
Hippocampal output suppresses orbitofrontal cortex schema cell formation - Nature Neuroscience
Inactivation of the ventral subiculum does not change existing schema cells in the orbitofrontal cortex (OFC) but aids their formation during new learning. This challenges the idea that the OFC relies...
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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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