Blair Shevlin

Blair Shevlin

@bshev.bsky.social

Postdoc @ Icahn School of Medicine. Computational Psychiatry. Neuroeconomics. Decision-Making

447 Followers 471 Following 19 Posts Joined Sep 2023
1 day ago
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Seminar - Kent Berridge - Bordeaux Neurocampus Pleasure, Desire, and Addiction // Venue: centre Broca

Pr Kent Berridge, one of the most influential behavioral neuroscientists of the 21st century, will be at the Bordeaux Neurocampus on March 24, 2026, for a lecture on pleasure, desire, and addiction 🀩

@univbordeaux.bsky.social @neurobordeaux.bsky.social

www.bordeaux-neurocampus.fr/event/semina...

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3 days ago
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Deconstruction of a memory engram reveals distinct ensembles recruited at learning - Nature Neuroscience Pouget et al. identified distinct CA1 neuron ensembles active during specific moments of fear learning and uncovered the core engram essential for memory formation.

How does the brain build a memory?
A common assumption is that the neurons activated during an experience collectively form the memory engram.
In our new Nature Neuroscience paper (finally out!), we show that this is not the case.
www.nature.com/articles/s41...

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2 days ago
Open Rank Faculty Cluster Hire Search for the New Department of Cognitive Science at Bocconi - Bocconi University

A new Department of Cognitive Science is being created at Bocconi University in Milan, Italy.

Here is the call for a cluster hire (for around 10 faculty) in all areas of cognitive science, at both junior and senior levels:

www.unibocconi.it/en/faculty-a...

Deadline: May 4th, 2026

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2 days ago

New (purely behavioral, computational psychiatry) preprint out from the neurosmiths, led by the brilliant @niloufarshahdoust.bsky.social

We hope this work will help us learn about the computational bases of impulsive choices underlying numerous mental health disorders.

skeeprint below:

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1 week ago
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BAMB! 2026 | Barcelona Summer School for Advanced Modeling of Behavior Intensive training for experienced researchers in cognitive science, computational neuroscience and neuro-AI. Five interconnected modules, expert faculty, hands-on projects. July 12-23, 2026.

24-Hour Final Call for BAMB! 2026 ⏳

Join us in Barcelona (July 12–23) and learn from our expert faculty:

@meganakpeters.bsky.social
@marcelomattar.bsky.social
@khamascience.bsky.social
@thecharleywu.bsky.social

Apply now:
www.bambschool.org

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4 days ago

8 days left to submit to the Human x AI Finance conference!
- πŸ† $1,000 prize for the best paper.
- ✈️ The top 4 papers will be invited for presentation at the Fink Center Conference on Financial Markets at UCLA Anderson School of Management (travel and lodging included).
πŸ”— humanxaifinance.org

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5 days ago
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Sycophantic AI distorts reality by returning responses that are biased to reinforce existing beliefs.

"sycophantic AI distorts belief, manufacturing certainty where there should be doubt."

Unbiased sampling produces discovery rates 5X higher! arxiv.org/pdf/2602.14270

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5 days ago
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πŸ“£ New publication πŸ“£

Very excited to share our new paper "A neural signature of adaptive mentalization" out now in Nature Neuroscience (the project started all the way back in 2018!); with
@niklasbuergi.bsky.social
@drgokhanaydogan.bsky.social
@christianruff.bsky.social

(1/4)

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1 week ago
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When you collect data online, are the results from humans or AI? In a project led by Booth PhD student Grace Zhang, we estimate the prevalence of AI agents on commonly used survey platforms:
osf.io/preprints/ps...
🧡

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1 week ago
Lab AI Policy | Todd Gureckis Clear expectations for how every member of our lab should use generative AI tools responsibly, transparently, and in a way that upholds rigorous, reproducible, open science.

draft lab ai policy, feel free to use, modify, or discuss! todd.gureckislab.org/2026/03/06/g...

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1 week ago
Graph of award probability of R35 and R01 from NIH factbook as a function of review rank percentile. As is apparent, 2025 is a significant departure, with lower award probabilities at all scores <40 and significant departures from norm, where even being in the top 10% is no longer a nearly certain indicator of success.

Data source: https://report.nih.gov/nihdatabook/report/302

The data is in: the NIH goalposts have shifted.

What were once almost certain fundable scores have become coin flips and what used to be likely grants have become aspirational, leading to fewer awards.

Another manifestation of how HHS policies have led to fewer awards and less science.

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1 week ago
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Task learning increases information redundancy of neural responses in macaque visual cortex How does the brain optimize sensory information for decision-making in new tasks? One hypothesis suggests that learning reduces redundancy in neural representations to improve efficiency, whereas anot...

RIP redundancy reduction?

Beautiful work by Liu & colleagues showing that neural redundancy increases with learning, as predicted by a Bayesian model:
www.science.org/doi/10.1126/...

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1 week ago
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Why we value things more as we are about to lose them: A reference-based theory A common belief is that we only truly appreciate things or people when we are about to lose them. This phenomenon is often observed in real-world scen…

Why we value things more as we are about to lose them

A novel theory that explains why subjective value and effort-based decisions change over time, shedding light on reference-dependent behavior in both every day and high-stakes decision-making contexts

www.sciencedirect.com/science/arti...

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1 week ago
Chapter 6 Chapter 5: Assessing Model Quality | Chapter 5: Assessing Model Quality - Does Our Model Make Sense? My notes for the advanced cognitive modeling course - 2026

my course notes on a bayesian workflow for (single agent) cognitive modeling are now fully revised and online: fusaroli.github.io/AdvancedCogn...

Predictive checks, updating checks, sensitivity analyses and simulation based calibration in @mc-stan.org

Feedback is very welcome!

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1 week ago
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Children's decision to challenge themselves on a novel task relates to their metacognitive monitoring of their ability Abstract. We examined potential processes by which children decide to make hard as opposed to easy choices to accomplish a goal. Five- to 7-year olds (N =

New paper out in Child Development (@srcdorg.bsky.social) with Dave Sobel (@candmlab.bsky.social)! ✨ We investigated how 5- to 7-year-old children decide to take on easy versus hard tasks while pursuing a goal. doi.org/10.1093/chid...

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1 week ago
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Do You Agree? Do You Strongly Agree? The Effect of the Number of Response Categories on Response Processes and Verification of Substantive Hypotheses Abstract. This study investigates how the number and labeling of response categories in survey scales affect respondent behavior, psychometric properties,

This is consistent with earlier psychometric work that suggests 5-7 is the best response scale options, but good to see that the finding holds up in contemporary research. Also, good to see that labeling scales whether anchored or not has little impact on findings. academic.oup.com/ijpor/articl...

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2 weeks ago
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The inferred value of unchosen options spreads to related items in memory Counterfactual thinking β€” considering what could have come of choosing the other path β€” can facilitate inference. Previous studies have demonstrated t…

πŸ“’New paper out today in @cognitionjournal.bsky.social!

Does the value of an unchosen option β€” inferred through counterfactual reasoning β€” spread to related items in memory, similar to how the value of a chosen option β€” acquired through direct experience β€” does?

In short, yes!

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2 weeks ago
Amplifiers of Epistemic Posture Essays and writing on AI

I'm a cognitive scientist with an interest in epistemic vigilance, and this essay that's been going around gave me pause.

I don't think it's straightforward to apply the concept of epistemic vigilance to interactions with LLMs, as this essay does.

🧡/

sbgeoaiphd.github.io/rotating_the...

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2 weeks ago
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A Movement-Independent Signature of Urgency During Human Perceptual Decision Making - PubMed How does the brain adjust its decision processes to ensure timely decision completion? Computational modelling and electrophysiological investigations have pointed to dynamic 'urgency' processes that serve to progressively reduce the quantity of evidence required to reach choice commitment as time e …

Check out our new paper which isolates a human brain signal that specifically tracks the growing urgency to commit to a choice pubmed.ncbi.nlm.nih.gov/41611534/. This one was a long time coming! Sterling work from @harveymccone.bsky.social and a bunch of past lab members!

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2 weeks ago
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Deciding for others alters metacognition leading to responsibility aversion Making decisions on behalf of other people reduces decision confidence, which leads to responsibility aversion.

Happy to share my first first-author paper, new in Science Advances: Deciding for others alters metacognition leading to responsibility aversion www.science.org/doi/10.1126/... #ScienceAdvancesResearch @zne-uzh.bsky.social @econ.uzh.ch

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2 weeks ago
Rapid modulation of choice behavior by ultrasound on the human frontal eye fields - Nature Communications Brief ultrasound to human frontal eye fields, but not motor cortex, rapidly biases eye movement contralaterally in a perceptual choice task. The size of this effect scales with individual baseline FEF...

Ultrasound gives our brain a nudge in the right direction 🧠

πŸ‘€ Look to your left, look to your right!

We used #ultrasound to stimulate the brain and it changed human choice behavior within a fraction of a second. No surgery, no implants.

Link to paper ⬇️

www.nature.com/articles/s41...

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2 weeks ago
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Come join us at BAMB! to learn all about modelling behavior and what Barcelona’s beaches have to offer πŸπŸ„β€β™‚οΈπŸŠβ€β™‚οΈ

Applications for 2026 are open here: www.bambschool.org

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2 weeks ago
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a penguin is sticking his head out of a hole next to a job application ALT: a penguin is sticking his head out of a hole next to a job application

🚨 JOB alert: πŸ“’
We are looking for a PhD student to work on our international @wellcometrust.bsky.social project on information gathering in OCD and Schizophrenia!
If you have a background in computational psychiatry / neuroimnaging and speak German, apply here: devcompsy.org/wp-content/u...

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2 weeks ago
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This Wednesday February 25! Dr. Michael Treadway (Emory University) is presenting in
@motcogmeet.bsky.social series: "Effort-Based Decision-Making and Its Discontents: Precision medicine approaches for understanding the pathophysiology and treatment of motivational deficits in mental illness" 1/

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2 weeks ago

Where you look next isn’t arbitrary.
In our new paper, we model human eye movements in immersive visual search as reinforcement learning under cognitive constraints. 🧡

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2 weeks ago
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in my decision-making course we devote one class to a group exercise in which the students need to use what they learned in Act 1 ("Rational Decision Making") to shut down a rogue AI in the semi distant future; this is the intro.

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2 weeks ago
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Amid Trump crackdown on Chinese students, one US university appears to block them altogether Purdue says no ban on Chinese students exists, but reportedly rescinded dozens of offers after warnings from legislators

Perdue banning all Chinese students just for national origin. No other reason. The Harper's Letter crowd must be crafting a humdinger of a new letter over this one.

www.theguardian.com/us-news/2026...

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3 weeks ago
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I reviewed 5+ fMRI papers on response inhibition within roughly the last year, and the same points come up over and over again. So I wrote a short note last week entitled "The unique limitations of BOLD-fMRI in the study of response inhibition". You can read it here.
osf.io/preprints/ps...

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3 weeks ago
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Postdoctoral Research Fellow in Social Decision Neuroscience at University of Birmingham Explore an exciting academic career as a Postdoctoral Research Fellow in Social Decision Neuroscience. Don't miss out on other academic jobs. Click to apply and explore more opportunities.

We are recruiting! Postdoctoral research fellow at www.sdn-lab.org, studying the computational & neural basis of social decision-making. Birmingham is a fantastic & affordable place to live, with one of the youngest populations in Europe & over 600 parks. Please share!
www.jobs.ac.uk/job/DQO275/p...

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3 weeks ago
Two side-by-side images depicting the nested hierarchical IPOMDP and the non-hierarchical x-IPOMDP mechanism.

What happens when we can't use recursive belief to compete? We can use anomaly detection instead!

Here, we (led by soon-to-be-Dr @nitalon.bsky.social ) devise a multi-agent account where compression & reward expectation are used to notice deception

jair.org/index.php/ja...

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