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Sepehr Razavi

@srazavi.bsky.social
270 followers 501 following 125 posts

Doctoral student, Social Computation and Representation Lab - www.socrlab.net/people

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Reposted by Sepehr Razavi
Parnian Rafei @parnianrafei.bsky.social · 07/08/2026
🚨 My new paper is out in CABN! 🚨@psychonomicsociety.bsky.social Do human 'habit' tasks measure the same thing? In this study, we compared the most commonly used paradigms, "Outcome Devaluation" & "Response Remapping", under matched training + time pressure 🧠⌛ link.springer.com/article/10.3...
link.springer.com
Does time pressure reveal habits? Divergent results from outcome devaluation and response remapping paradigms - Cognitive, Affective, & Behavioral Neuroscience
Habits are central to daily life but remain difficult to study in the lab. Outcome Devaluation is often considered a “gold standard” paradigm for habit measurement; yet human studies have produced mix...
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Sepehr Razavi @srazavi.bsky.social · 09/09/2026
As always, feel free to reach out to me here or, better yet, email @joebarnby.com for the link :)
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Sepehr Razavi @srazavi.bsky.social · 09/09/2026
In so doing, they developed a Bayesian computational model that synthesizes and explains this variability by revealing the cognitive logic of how observers interpret and learn from punishment.
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Sepehr Razavi @srazavi.bsky.social · 09/09/2026
In the second project, Dr. Radkani and colleagues turned their focus to moral inferences that people make from observing punishment. Their studies revealed how the same punitive decision could lead to contrasting and sometimes contradictory inferences across individuals and contexts.
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Sepehr Razavi @srazavi.bsky.social · 09/09/2026
The first reveals a fundamental asymmetry between experiential and observational evidence accumulation, i.e., learning from our own experiences versus observing others’ similar experiences. The geometry of neuronal population activity in monkeys’ ACC provided a mechanistic explanation for this.
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Sepehr Razavi @srazavi.bsky.social · 09/09/2026
Her talk will centre two projects that attempt to uncover the cognitive and neural mechanisms underlying such asymmetries in our social and moral learning, one anchored in cognitive neuroscience and the other in computational cognitive science.
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Sepehr Razavi @srazavi.bsky.social · 09/09/2026
Setayesh's talk will start with a puzzle: that while we use our observations to form and update beliefs about hidden states of the world, the same observation will not always lead to similar inferences across different individuals and even within individuals across different contexts.
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Sepehr Razavi @srazavi.bsky.social · 09/09/2026
The Social Computation and Representation Lab talk series is back tomorrow! And no better way to start the new academic year than by following @setayeshradkani.bsky.social 's talk as she weaves together two complementary strands of her investigations into social cognition.
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Sepehr Razavi @srazavi.bsky.social · 04/09/2026
Is it possible to follow online?
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Sepehr Razavi @srazavi.bsky.social · 27/08/2026
miss you mariam, let’s find a time to catch up :)
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Sepehr Razavi @srazavi.bsky.social · 25/08/2026
Congratulations @mkwittmann.bsky.social, so well-deserved!
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Sepehr Razavi @srazavi.bsky.social · 20/08/2026
Everything about this is heartbreaking beyond measure—I wish I/we had done more to prevent his death
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Sepehr Razavi @srazavi.bsky.social · 14/08/2026
millikan's reply along the lines of 'who cares about our intuitions about swamp entities, I live in the real world' parsimoniously covers this nicely too
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Reposted by Sepehr Razavi
Hayley Dorfman @hayleydorfman.bsky.social · 04/08/2026
If you’re at #CCN2026 come stop by Sep’s poster at 2pm today! 🌵🤖👥
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Sepehr Razavi @srazavi.bsky.social · 04/08/2026
If you’re at CCN swing by at 2pm to hear about a social agency project I’ve been working on under the supervision of @joebarnby.com & @hayleydorfman.bsky.social (and Reuth Mirsky)
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Sepehr Razavi @srazavi.bsky.social · 02/08/2026
lucky and excited to be at this great pre-CCN workshop :) come to my poster on social agency on Tuesday
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Reposted by Sepehr Razavi
Alex Pike @alexandrapike.bsky.social · 28/07/2026
New paper alert! In this paper we were interested to formally test some of the assumptions made by computational psychiatrists - assumptions about parameter recoverability, reliability and validity. www.cambridge.org/core/journal...
cambridge.org
The recoverability, reliability, and generalizability of reward processing parameters and relation to mental health symptoms | Psychological Medicine | Cambridge Core
The recoverability, reliability, and generalizability of reward processing parameters and relation to mental health symptoms - Volume 56
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Sepehr Razavi @srazavi.bsky.social · 28/07/2026
Incredible
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Reposted by Sepehr Razavi
PredictivePapers @predictivepapers.bsky.social · 28/07/2026
An active inference account of sneezing directly into someone's face doi.org/10.3389/fnhum.2019.146347
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Reposted by Sepehr Razavi
Joe Barnby @joebarnby.com · 14/07/2026
If you’re at #CPC2026 come and visit Seps poster ! Sep is leading work testing how social environment complexity interacts during learning to form maladaptive beliefs using connectionist models
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Sepehr Razavi @srazavi.bsky.social · 14/07/2026
Will be between here Boston & New York until Cognitive Computational Neuroscience and the promising Metacognitive Science workshop in early August so feel free to reach out if you’re around for any of those :)
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Sepehr Razavi @srazavi.bsky.social · 14/07/2026
Mood a bit dampened by a somewhat humiliating ‘random’ check in the process of entering the US but still very excited to present some of the work we’ve been doing at the Social Computation and Representation lab, starting at Computational Psychiatry in New Haven tomorrow!
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Reposted by Sepehr Razavi
Charley Wu @thecharleywu.bsky.social · 20/06/2026
Look how far we've come in just a few years! We're fast as well! It turns out, recruiting reviewers is much easier when they're not being used as free labor for massively profitable publishers Support free-to-publish and Open Access science by submitting to Open Mind today! direct.mit.edu/opmi
direct.mit.edu
Open Mind | MIT Press
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Sepehr Razavi @srazavi.bsky.social · 20/06/2026
It cracks me up when that there wasn’t even an image or anything thrown in there
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Sepehr Razavi @srazavi.bsky.social · 11/06/2026
Finally got to read this, what a cool and incisive paper, congrats Shervin
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Sepehr Razavi @srazavi.bsky.social · 10/06/2026
Reminder, this is happening tomorrow!
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Reposted by Sepehr Razavi
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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Reposted by Sepehr Razavi
Hayley Dorfman @hayleydorfman.bsky.social · 08/06/2026
🌵🏜️🌵 Out now in @cognitionjournal.bsky.social with @rbhui.bsky.social! If your advisor sends you an unclear email, do you interpret it as good or bad? 😏😱 In a new paper, we show how people make inferences about this type of ambiguous feedback during learning. www.sciencedirect.com/science/arti...
sciencedirect.com
Ambiguity and confirmatory reward learning
We tend to interpret feedback in ways that confirm our pre-existing beliefs. Such confirmatory tendencies are often viewed as cognitive flaws, but mig…
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Reposted by Sepehr Razavi
Ali Mahmoodi @alimahmoodi.bsky.social · 04/06/2026
Looking forward to it!
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Sepehr Razavi @srazavi.bsky.social · 03/06/2026
As always, feel free to reach out to me or @joebarnby.com for a link if you would like to join and here's a link to Ali's excellent paper: www-nature-com/articles/s41...
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Sepehr Razavi @srazavi.bsky.social · 03/06/2026
Coming up next week at the SoCR lab talk series is @alimahmoodi.bsky.social, who will be discussing his recent thought-provoking perspective, which advocates for a computational view of neural mechanisms of social cognition (contra an anatomical one).
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Reposted by Sepehr Razavi
Hayley Dorfman @hayleydorfman.bsky.social · 27/05/2026
Join us tomorrow afternoon at #APS2026BCN! @psychscience.bsky.social @ninarouhani.bsky.social @camillephaneuf.bsky.social @katieinsel.bsky.social
APS 2026 symposium poster on Computational insights into how motivational and socio-emotional factors shape decision-making
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Reposted by Sepehr Razavi
Prof Nichola Raihani @nicholaraihani.bsky.social · 08/05/2026
Sneak peek at the US cover for THE THINKING ANIMAL, coming Jan '27. Looking forward to sharing more - soon! @stmartinspress.bsky.social @zcosini.bsky.social
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Sepehr Razavi @srazavi.bsky.social · 09/04/2026
we have the same pen hehe
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Sepehr Razavi @srazavi.bsky.social · 02/04/2026
Reminder that this is happening later today 🙂
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Sepehr Razavi @srazavi.bsky.social · 01/04/2026
Amazing work! Looking forward to reading about the next steps :)
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Sepehr Razavi @srazavi.bsky.social · 31/03/2026
Please note the change of time (9.am East Coast), and as always, contact me or @joebarnby.com for a link to the talk :)
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Sepehr Razavi @srazavi.bsky.social · 31/03/2026
This Thursday, we’re delighted to welcome @carocharp.bsky.social, PI of the Social Learning and Decisions Lab at the University of Maryland. She will be delivering what promises to be an insightful talk: 'Seeking advice and seeking feedback: cognitive mechanisms and relevance for psychopathology.'
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Sepehr Razavi @srazavi.bsky.social · 16/03/2026
Congrats Joe, what a fun set of experiments
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Reposted by Sepehr Razavi
Joe Barnby @joebarnby.com · 16/03/2026
What connects difficulties in social cognition, self-awareness, and abstract reasoning in those with Corpus Callosum Dysgenesis (CCD)? Here, across three experiments, we find that the corpus callosum is integral to metacognitive efficiency - www.biorxiv.org/content/10.6...
Gemini said
This schematic outlines three experiments (Online, Lab, and VR) comparing individuals with Cerebral Cavernous Malformations (CCD) to Neurotypical (NT) controls using Random Dot Kinematograms (RDK).

Panel A: Study Overview
Experiment 1 (Online): 10 CCD vs. 85 NT participants using a computer mouse.

Experiment 2 (Lab): 11 CCD vs. 7 NT participants using a button box.

Experiment 3 (VR): 10 CCD vs. 13 NT participants using a VR headset.

Brain Icon: A blue line divides the hemispheres with a crossed-out arrow, suggesting a focus on disrupted interhemispheric communication.

Panel B: Classic RDK (Exp 1 & 2)
A trial sequence on a grey background:

Fixation (1600ms): A central cross.

Motion (1500ms): A circular field of moving dots (red, blue, and white).

Decision (Unlimited): Selection of "L" or "R" buttons.

Confidence (Unlimited): A slider ranging from "Decrease" to "Increase" to rate certainty.

Panel C: VR RDK (Exp 3)
A faster trial sequence used in the VR environment:

Fixation: Until central fixation is achieved.

Motion (180ms): Dots appear within a narrow vertical rectangle.

Decision (Unlimited): A prompt shows blue/orange bars for direction selection.

Panel D: Visual Presentation (Exp 3)
Diagrams showing how stimuli are mapped from the eyes to the brain hemispheres (L and R):

Binocular: Stimuli presented to both eyes, traveling to both hemispheres.

Lateralised: A 3° shift from center presented to one eye.

Monocular: Stimuli presented to one eye, directed specifically toward the right or left hemifield to isolate hemispheric processing.
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Sam Gershman @gershbrain.bsky.social · 14/03/2026
I think Fodor & Pylyshyn's 1988 paper is possibly the most mischaracterized paper in the history of cognitive science. It's often cited as arguing that neural networks cannot achieve systematicity, compositionality, and productivity. But that's not what they actually argue...
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Sepehr Razavi @srazavi.bsky.social · 11/03/2026
A reminder that this is happening tomorrow!
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Reposted by Sepehr Razavi
Georgia Turner @georgiaturner.bsky.social · 24/02/2026
🚨New pre-print🚨 osf.io/preprints/ps... What if the relationship between smartphone use and mental health depends not just on specific harmful or beneficial activities, but also on how users transition between activities?
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Sepehr Razavi @srazavi.bsky.social · 06/03/2026
As always, message me for a link or, better yet, contact @joebarnby.com
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Sepehr Razavi @srazavi.bsky.social · 06/03/2026
In this talk Andreas will speak about the implementation of I-POMDPs, results obtained through practical studies and observations on challenges and further approaches to making behaviour in experiments tractable, starting from a well-known implementation of I-POMDPs for a multi-round trust task.
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Sepehr Razavi @srazavi.bsky.social · 06/03/2026
However, implementing them in a way that allows for acceptable computation times while having enough parameters to describe the nuances of human behaviour is difficult and an ongoing challenge in research.
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Sepehr Razavi @srazavi.bsky.social · 06/03/2026
These processes provide interpretable parametrizations of agent interactions, with factors like fairness mindedness/inequality aversion, irritability or risk aversion, whilst also having established procedures for learning, models of other actors/theory of mind and planning.
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Sepehr Razavi @srazavi.bsky.social · 06/03/2026
To gain insights into choice making in human social tasks, factors underlying (un)cooperative actions and the interpretation of others' actions and signals in social settings, Interactive Partially Observable Markov Decision Processes are an indispensable – yet intricate - model-building tool.
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Sepehr Razavi @srazavi.bsky.social · 06/03/2026
Very happy to announce next week's SoCR lab guest, Andreas Hula, who will be talking about the uses and misuses of I-POMDPs in model-building human social decision-making 🧵
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Sepehr Razavi @srazavi.bsky.social · 18/02/2026
This is happening tomorrow!
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