Andrey Chetverikov
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achetverikov.bsky.social
Andrey Chetverikov
@achetverikov.bsky.social
810 followers 600 following 290 posts
Associate Professor in Cognitive Psychology at the University of Bergen, Norway. I study decision-making and biases in perception and visual working memory, with occasional forays into higher level decisions. https://andreychetverikov.org
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Reposted by Andrey Chetverikov
rebeccasear.bsky.social
"Professors' inboxes are like kids' lunchboxes - they require constant viligance and lots of things fester when they inevitably go unattended. In other words, when professors don't respond, it's rarely personal. They probably forgot or got too busy. Email again"
siobhancully.bsky.social Siobhán Cully 🇺🇸 🐱🥼🤓🩼 @siobhancully.bsky.social · 2d
My lab site is very much still under construction, but we are in #grad application season and I thought I'd blog about stuff I discuss often with prospective applicants to our program in #anthropology. Check it out. Let me know hits and misses.

www.evolvedlab.net/blog
Blog | Evolve D Lab
www.evolvedlab.net
November 13, 2025 at 8:12 AM
achetverikov.bsky.social
I'm not a rhythms person, but this illustration deserves a repost.
November 13, 2025 at 1:22 PM
Reposted by Andrey Chetverikov
costantinoai.bsky.social
Super excited to share a new preprint!

We asked a simple-but-big question:

What changes in the brain when someone becomes an expert?

Using chess ♟️ + fMRI 🧠 + representational geometry & dimensionality 📈, we ask:

1️⃣ WHAT information is encoded?
2️⃣ HOW is it structured?
3️⃣ WHERE is it expressed?

1/n
November 12, 2025 at 10:56 PM
Reposted by Andrey Chetverikov
sampendu.bsky.social
The Ponizsa illusion - Kanizsa triangle produces Ponzo illusion, but oddly it inverts apparent depth: the longer line looks closer! Also has an inversion effect like we studied in Altan et al 2025 Proc Roy Soc (doi.org/10.1098/rspb...) but it's also in reverse! 🤔
#visionscience #psychscisky
November 12, 2025 at 2:58 AM
Reposted by Andrey Chetverikov
hansonmark.bsky.social
We wrote the Strain on scientific publishing to highlight the problems of time & trust. With a fantastic group of co-authors, we present The Drain of Scientific Publishing:

a 🧵 1/n

Drain: arxiv.org/abs/2511.04820
Strain: direct.mit.edu/qss/article/...
Oligopoly: direct.mit.edu/qss/article/...
A table showing profit margins of major publishers. A snippet of text related to this table is below. 1. The four-fold drain 1.1 Money Currently, academic publishing is dominated by profit-oriented, multinational companies for whom scientific knowledge is a commodity to be sold back to the academic community who created it. The dominant four are Elsevier, Springer Nature, Wiley and Taylor & Francis, which collectively generated over US$7.1 billion in revenue from journal publishing in 2024 alone, and over US$12 billion in profits between 2019 and 2024 (Table 1A). Their profit margins have always been over 30% in the last five years, and for the largest publisher (Elsevier) always over 37%. Against many comparators, across many sectors, scientific publishing is one of the most consistently profitable industries (Table S1). These financial arrangements make a substantial difference to science budgets. In 2024, 46% of Elsevier revenues and 53% of Taylor & Francis revenues were generated in North America, meaning that North American researchers were charged over US$2.27 billion by just two for-profit publishers. The Canadian research councils and the US National Science Foundation were allocated US$9.3 billion in that year. A figure detailing the drain on researcher time. 1. The four-fold drain 1.2 Time The number of papers published each year is growing faster than the scientific workforce, with the number of papers per researcher almost doubling between 1996 and 2022 (Figure 1A). This reflects the fact that publishers’ commercial desire to publish (sell) more material has aligned well with the competitive prestige culture in which publications help secure jobs, grants, promotions, and awards. To the extent that this growth is driven by a pressure for profit, rather than scholarly imperatives, it distorts the way researchers spend their time. The publishing system depends on unpaid reviewer labour, estimated to be over 130 million unpaid hours annually in 2020 alone (9). Researchers have complained about the demands of peer-review for decades, but the scale of the problem is now worse, with editors reporting widespread difficulties recruiting reviewers. The growth in publications involves not only the authors’ time, but that of academic editors and reviewers who are dealing with so many review demands. Even more seriously, the imperative to produce ever more articles reshapes the nature of scientific inquiry. Evidence across multiple fields shows that more papers result in ‘ossification’, not new ideas (10). It may seem paradoxical that more papers can slow progress until one considers how it affects researchers’ time. While rewards remain tied to volume, prestige, and impact of publications, researchers will be nudged away from riskier, local, interdisciplinary, and long-term work. The result is a treadmill of constant activity with limited progress whereas core scholarly practices – such as reading, reflecting and engaging with others’ contributions – is de-prioritized. What looks like productivity often masks intellectual exhaustion built on a demoralizing, narrowing scientific vision. A table of profit margins across industries. The section of text related to this table is below: 1. The four-fold drain 1.1 Money Currently, academic publishing is dominated by profit-oriented, multinational companies for whom scientific knowledge is a commodity to be sold back to the academic community who created it. The dominant four are Elsevier, Springer Nature, Wiley and Taylor & Francis, which collectively generated over US$7.1 billion in revenue from journal publishing in 2024 alone, and over US$12 billion in profits between 2019 and 2024 (Table 1A). Their profit margins have always been over 30% in the last five years, and for the largest publisher (Elsevier) always over 37%. Against many comparators, across many sectors, scientific publishing is one of the most consistently profitable industries (Table S1). These financial arrangements make a substantial difference to science budgets. In 2024, 46% of Elsevier revenues and 53% of Taylor & Francis revenues were generated in North America, meaning that North American researchers were charged over US$2.27 billion by just two for-profit publishers. The Canadian research councils and the US National Science Foundation were allocated US$9.3 billion in that year. The costs of inaction are plain: wasted public funds, lost researcher time, compromised scientific integrity and eroded public trust. Today, the system rewards commercial publishers first, and science second. Without bold action from the funders we risk continuing to pour resources into a system that prioritizes profit over the advancement of scientific knowledge.
November 11, 2025 at 11:52 AM
achetverikov.bsky.social
This is my soul animal at the cover of the new Andrew Bird's EP (good music as well)

soundcloud.com/andrewbird/s...
November 10, 2025 at 4:00 PM
achetverikov.bsky.social
FYI, if you are using Zotero, koofr.eu provides a free 10 gb cloud with webdav that could be used for synchronizing pdfs. I tested it this week as I no longer have access to the server I used previously. Seems to work well. koofr.eu/blog/posts/k...
Koofr with Zotero via WebDAV
Are you using Zotero with Box and don’t know what to do when Box support for WebDAV eventually runs out? Are you searching for Zotero with Box alternative? Don’t fret, Koofr is here for you. Read abou...
koofr.eu
November 8, 2025 at 4:11 PM
achetverikov.bsky.social
There was a paper in Science few years back claiming that they could get temporal precision on the scale of ms from _fMRI_ data. It caused quite a discussion in the lab I worked at. Turns out, it's been retracted this September: www.science.org/doi/10.1126/... Is there a thread about it somewhere?
Retraction
On 14 October 2022, Science published the Research Article “In vivo direct imaging of neuronal activity at high temporospatial resolution” by P. T. Toi et al. (1). On 24 August 2023, Science ran an Ed...
www.science.org
November 8, 2025 at 4:05 PM
achetverikov.bsky.social
Huge congrats to @ben-kop.bsky.social on a successful PhD defense! Ben, it was my great pleasure to work with you, and I will also fondly remember our little chats at parties and conferences =) All the best in your career, wherever it takes you.
November 5, 2025 at 4:48 PM
Reposted by Andrey Chetverikov
psychonomicsociety.bsky.social
We see the forest, but what do we know about the trees? Our perception of ensembles may be richer than previously thought. Read more in a post by @ankosov.bsky.social on a new #psynomPBR paper by Vladislav Khvostov @khvo100v.bsky.social, Árni Gunnar Ásgeirsson, & Árni Kristjánsson buff.ly/3NCjHIz
November 4, 2025 at 9:01 PM
Reposted by Andrey Chetverikov
martinhebart.bsky.social
Please repost! I am looking for a PhD candidate in the area of Computational Cognitive Neuroscience to start in early 2026.

The position is funded as part of the Excellence Cluster "The Adaptive Mind" at @jlugiessen.bsky.social.

Please apply here until Nov 25:
www.uni-giessen.de/de/ueber-uns...
View from your office onto Giessen and surrounding villages.
November 4, 2025 at 1:57 PM
Reposted by Andrey Chetverikov
belcourttheatre.bsky.social
"I wanted a real ship, because the ship is a character... I wanted the movie to test the capabilities of every single craft in moviemaking." —Guillermo del Toro @realgdt.bsky.social

More dates/showtimes added for FRANKENSTEIN > 🎟 bit.ly/Belcourt-FRANKENSTEIN
November 4, 2025 at 2:00 AM
Reposted by Andrey Chetverikov
pengzell.bsky.social
Lol. Ibn Khaldun (1332-1406) had a few bangers too, like this: "people publish too much"
Ibn Khaldun's Muqaddimah, written in 1377: 34. The great number of scholarly works (available) is an obstacle on the path to attaining scholarship. It should be known that among the things that are harmful to the human quest for knowledge and to the attainment of a thorough scholarship are the great number of works (available), the large variety in technical terminology (needed for purposes) of instruction, and the numerous (different) methods (used in those works), 1133 The student is required to have a ready knowledge of (all) that. Only then is he considered an accomplished scholar. Thus, the student must know all the (works), or most of them, and observe the methods used in them. His whole lifetime would not suffice to know all the literature that exists in a single discipline, (even) if he were to devote himself entirely to it. Thus, he must of necessity fall short of attaining scholarship.
November 4, 2025 at 5:06 AM
Reposted by Andrey Chetverikov
icevislab.bsky.social
Open tenure track the University of Akureyri, Iceland.
November 3, 2025 at 9:33 PM
Reposted by Andrey Chetverikov
avehtari.bsky.social
Now I'm also looking for a research software engineer to implement a pile of research results to R packages loo, posterior, bayesplot, projpred, priorsense, brms or/and Python packages ArviZ, Bambi and Kulprit. Apply by email with no specific deadline (see contact info at users.aalto.fi/~ave/)
avehtari.bsky.social Aki Vehtari @avehtari.bsky.social · 15d
I'm now also looking for a postdoc with strong Bayesian background and interest in developing Bayesian cross-validation theory, methods and software. Apply by email with no specific deadline (see contact information at users.aalto.fi/~ave/).

Others, please share
avehtari.bsky.social Aki Vehtari @avehtari.bsky.social · Oct 6
I'm looking for a doctoral student with Bayesian background to work on Bayesian workflow and cross-validation (see my publication list users.aalto.fi/~ave/publica... for my recent work) at Aalto University.

Apply through the ELLIS PhD program (dl October 31) ellis.eu/news/ellis-p...
November 3, 2025 at 11:13 AM
Reposted by Andrey Chetverikov
avehtari.bsky.social
I'm now also looking for a postdoc with strong Bayesian background and interest in developing Bayesian cross-validation theory, methods and software. Apply by email with no specific deadline (see contact information at users.aalto.fi/~ave/).

Others, please share
avehtari.bsky.social Aki Vehtari @avehtari.bsky.social · Oct 6
I'm looking for a doctoral student with Bayesian background to work on Bayesian workflow and cross-validation (see my publication list users.aalto.fi/~ave/publica... for my recent work) at Aalto University.

Apply through the ELLIS PhD program (dl October 31) ellis.eu/news/ellis-p...
ELLIS PhD Program: Call for Applications 2025
The ELLIS mission is to create a diverse European network that promotes research excellence and advances breakthroughs in AI, as well as a pan-European PhD program to educate the next generation of AI...
ellis.eu
October 29, 2025 at 2:37 PM
Reposted by Andrey Chetverikov
johalgermissen.bsky.social
Report of an adverse event (brain injury leading to lasting cognitive deficits) during a TUS trial targeting NAc to treat substance use disorder, with unclarity about the stimulation parameters---see the comments of the dissenting reviewers of this letter:
efouragnan.bsky.social Elsa Fouragnan @efouragnan.bsky.social · 10d
A brain injury was reported in a trial using ultrasound, framed as low-intensity TUS. Kim Butts Pauly and I reviewed the case and disagreed with how it's presented. Key acoustic data are missing.
Case: doi.org/10.1016/j.br...
Letters: www.elsa-fouragnan.com/blog | web.stanford.edu/~kimbutts/Le...
Brain Injury During Focused Ultrasound Neuromodulation for Substance Use Disorder
www.sciencedirect.com
November 3, 2025 at 11:47 AM
Reposted by Andrey Chetverikov
williamngiam.github.io
What is the representation underlying cognition? Formal models rely on multidimensional scaling of similarity judgments to derive the representation. In this preprint with @mdlbayes.bsky.social, we take an alternative approach; we build Bayesian generative models for three cognitive tasks. /1
psyarxivbot.bsky.social PsyArXivBot @psyarxivbot.bsky.social · 11d
Similarity judgments and visual working memory do not share the same cognitive representation: https://osf.io/fm9vz
November 3, 2025 at 7:34 AM
Reposted by Andrey Chetverikov
utochkin.bsky.social
Check our new Psych Science paper w/Daniil Azarov & Daniil Grigorev. Although an ability to recognize a familiar object among new ones clearly depends on how many and which objects there are, we show a remarkable stability of underlying "representational spaces"
journals.sagepub.com/doi/10.1177/...
October 24, 2025 at 1:52 PM
Reposted by Andrey Chetverikov
pengzell.bsky.social
Mistaking verbal fluency for intelligence was never a good idea and LLMs bursting that bubble is probably not bad, actually

<norman rockwell man standing JPG>
October 30, 2025 at 1:26 PM
achetverikov.bsky.social
new preprint on serial dependence and uncertainty! interesting stuff.
October 30, 2025 at 2:33 PM
Reposted by Andrey Chetverikov
pengzell.bsky.social
Every major academic debate is just a 50-year exercise in pretending the middle ground doesn’t exist
October 30, 2025 at 7:31 AM
achetverikov.bsky.social
Haven't read the book, but I was very confused by this decision tree on the cover
jennygrankin.bsky.social Jenny G. Rankin, PhD @jennygrankin.bsky.social · Feb 19
Did you know former pro poker player ♠️ @annieduke.com has her PhD in #CognitivePsychology & writes about #DecisionScience? I'm so pumped to read her books! 🤩📚🔖 www.today.com/video/annie-...
October 29, 2025 at 10:22 AM
Reposted by Andrey Chetverikov
haegenslab.bsky.social
Check out our latest work led by @joeyzhou.bsky.social on alpha oscillatory networks in PLOS Biology!
➡️ journals.plos.org/plosbiology/...
Do ongoing alpha activity fluctuations influence perceptual sensitivity or criterion?
Distinct alpha networks modulate different aspects of perceptual decision-making
Fluctuations in alpha-band neural oscillations influence whether we perceive faint stimuli, but how these oscillations relate to different perceptual processes is not clear. This study shows that alph...
journals.plos.org
October 23, 2025 at 7:27 PM
Reposted by Andrey Chetverikov
matthiasnau.bsky.social
Current trends in European Research funding... 😵‍💫 erc.europa.eu/news-events/...
October 23, 2025 at 1:24 PM