Sebastiaan Mathôt's Avatar

Sebastiaan Mathôt

@cogsci.nl.bsky.social

cogsci.nl/smathot Cognitive psychologist interested in perception, attention, and pupillometry. Developer of OpenSesame and other open-source scientific software. Writer of short stories (suchwasnot.com) and non-fiction (Een wereld vol denkers).

1,493 Followers  |  2,307 Following  |  373 Posts  |  Joined: 31.10.2023  |  1.9631

Latest posts by cogsci.nl on Bluesky

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Opinion | I’m the Prime Minister of Spain. This Is Why the West Needs Migrants. - The New York Times In Spain, it is our duty to become the welcoming and tolerant society our ancestors would have hoped to find on the other side of our borders.

Pedro Sánchez, prime minister of Spain, shows what pragmatic and ideological leadership looks like www.nytimes.com/2026/02/04/o...

05.02.2026 06:19 — 👍 8    🔁 5    💬 0    📌 0
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Article original: ec.social-network.europa.eu/@EUCommissio...

03.02.2026 18:33 — 👍 1    🔁 0    💬 0    📌 0
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@casperalbers.nl on Bluesky The open science team @ @rug.nl has set up a Mastodon starter pack with all UG-institutes and colleagues with an account over there fedidevs.com/s/ODc1/ https://fedidevs.com/s/ODc1/
03.02.2026 08:26 — 👍 1    🔁 1    💬 0    📌 1
Orsima ichneumon, jumping spider-ant
Orsima ichneumon, jumping spider-ant

#Jumpingspiders are best known for being cute, but there's also a branch of not-so-cute-but-wonderful ant-mimicking species. The head mimics the abdomen, which is a bit disorienting! Probably evolved mainly to avoid predation—ants are unattractive prey. youtu.be/XRUZGtdp_TM... #biology #science

03.02.2026 06:37 — 👍 1    🔁 0    💬 0    📌 0
Algoritme van de samenleving -  Wat heeft een mier aan AI
Algoritme van de samenleving - Wat heeft een mier aan AI

Vergelijkend onderzoek laat verrassende overeenkomsten zien in het denken van mens, dier en AI. Wat betekent dit voor dierenwelzijn? Kijk de @knaw-nl.bsky.social lezing terug! #AI #psychologie #biologie youtu.be/5AWt641DlJI...

02.02.2026 18:35 — 👍 0    🔁 0    💬 0    📌 0
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New year, new digital you? Join the UG Digital Autonomy Fair! | Library | University of Groningen Start 2026 with a resolution that matters: Take back control of your digital academic life.Join the first University of Groningen Digital Autonomy Fair on...

The @rug.nl is aiming for complete #digitalautonomy by 2030 🕊️ Looking forward to discussing this ambitious plan at tomorrow's autonomy fair. www.rug.nl/library/cale... #science #bigtech @citrug.bsky.social

02.02.2026 16:12 — 👍 4    🔁 0    💬 0    📌 0
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Na een interview met@knaw-nl.bsky.social kreeg ik een vriendelijk mailtje van Thomas Moerland. Ben benieuwd wat hij te zeggen heeft in Van IQ naar #AI. Sowieso leuk om Nederlandse boeken te ontdekken die qua onderwerp raken aan Een Wereld Vol Denkers. #wetenschap #boeken

01.02.2026 19:46 — 👍 1    🔁 0    💬 0    📌 0
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PhD Scholarship

My Centre is a unique place to do a PhD in Philosophy, because you can be in constant contact with experts in veterinary medicine, psychology, zoology and policy and be part of a team united by a shared interest in animal minds. We now have our 1st ever PhD scholarship: www.lse.ac.uk/sentience/phd

30.01.2026 07:39 — 👍 129    🔁 69    💬 1    📌 4

Another study by @cvanbuck.bsky.social. Results similar to our preprint: pupil size is a reliable overall measure of bright/ dark processing, but this effect does not (or only very weakly) correlate with individual differences in #mentalimagery / #aphantasia
doi.org/10.1016/j.ne... #psychology

30.01.2026 08:42 — 👍 8    🔁 4    💬 0    📌 1
Digital illustration of a na'abak done in 2015. This bird is mostly brown, with a reddish brow, white throat, black speckled breast, and a big broad fan-shaped tail - orange the base, fading to black, with a white tip. The brushstrokes here are clumsy, the posture is stiff, and there's little attempt at shading or rendering.

Digital illustration of a na'abak done in 2015. This bird is mostly brown, with a reddish brow, white throat, black speckled breast, and a big broad fan-shaped tail - orange the base, fading to black, with a white tip. The brushstrokes here are clumsy, the posture is stiff, and there's little attempt at shading or rendering.

Same bird in a very similar posture to before, but this looks much more active now, at a 3/4 view instead of side on, perched on a branch. The eyes look wide and alert, the tail is slightly cocked as it prepares to leap right off its perch. The rendering is much more precise, as is the lighting, giving a more lifelike appearance.

Same bird in a very similar posture to before, but this looks much more active now, at a 3/4 view instead of side on, perched on a branch. The eyes look wide and alert, the tail is slightly cocked as it prepares to leap right off its perch. The rendering is much more precise, as is the lighting, giving a more lifelike appearance.

Then vs now(ish): 2015 (left) vs 2022 (right) of the same bird, Micronesian Rufous Fantail/na'abak. I started taking my own art a lot more seriously in 2014 and some pretty explosive growth in skill and quality happened fast. Practice really is everything. 🎨🪶 #SciArt #BirdArt

13.02.2025 17:05 — 👍 284    🔁 54    💬 2    📌 0
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Volgens @rensbod.bsky.social in Het unieke dier is het vermogen tot onbegrensde recursie het cruciale verschil tussen mens en dier – een sterke (en mijn inziens twijfelachtige) bewering. Ben benieuwd wat voor onderbouwing er volgt! #wetenschap

29.01.2026 17:36 — 👍 0    🔁 0    💬 0    📌 0

🌱🌎🐝🤖

28.01.2026 19:02 — 👍 1    🔁 1    💬 0    📌 0
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“Een wereld vol denkers”: A book by Sebastiaan Mathôt | Mindwise

"If you look closely, there are lots of similarities in how humans, animals, plants, and AI think. But there are also differences, and these differences are just as fascinating and important." mindwise-groningen.nl/een-wereld-v... #psychology #biology #AI #science

28.01.2026 16:18 — 👍 6    🔁 1    💬 0    📌 1

Really excellent talk! Good presentation, good build-up, good science. 👏

28.01.2026 16:16 — 👍 0    🔁 0    💬 1    📌 0
How reality is simulated by your brain | Surgya Gayet | TEDxEindhoven
YouTube video by TEDx Talks How reality is simulated by your brain | Surgya Gayet | TEDxEindhoven

My first TEDx talk just came out. It's always fun to talk about your own research area to the general audience, and its even more fun when you are lucky enough to be supported by such a platform. Happy to hear your thoughts :-)

youtu.be/UyUclyHx8d8?...

28.01.2026 15:39 — 👍 38    🔁 10    💬 2    📌 0
Feature and space-based interference with functionally active and passive items in working memory Functionally active and passive states in working memory have been related to different neural mechanisms. Memoranda in active states might be maintained by persistent neural firing, whereas memoranda in passive states might be maintained through short-term synaptic plasticity. We reasoned that this might make these items differentially susceptible to interference during maintenance, in particular that passively maintained items might be more robust. To test this hypothesis, we gave our participants a working memory task in which one item was prioritised (active) by always probing it first, while the other item was deprioritised (passive) by always probing it second. In two experiments, on half the trials, we presented an interfering task during memory maintenance, in which the stimuli matched either the feature dimension of the memory items (colour or orientation), or their spatial location. Whether the interfering task appeared on a given trial was unpredictable. In a third experiment where participants were given prior knowledge of the interference condition, and finally in a fourth experiment we used a reward-based prioritisation cue. Across experiments, we found that both active and passive memory items were affected by interference to a similar extent, with overall performance being closely matched in all experiments. We further investigated precision and probability of target response parameters from the standard mixture model, which also showed no differences between states. We conclude that active and passive items, although potentially stored in different neuronal states, do not show differential susceptibility to interference. ### Competing Interest Statement The authors have declared no competing interest.

🎉 My first first-author paper was just accepted in JEP:HPP! We asked what “active” vs “passive” WM states do - do they protect against interference? Across 4 behavioural experiments we find no reliable protection. Updated preprint here: doi.org/10.1101/2024.02.05.578913 @elkanakyurek.bsky.social

27.01.2026 16:23 — 👍 17    🔁 5    💬 0    📌 0
Wat heeft een mier aan AI? - KNAW Als mensen leren we steeds meer over hoe dieren in de wereld staan. Via boeken en documentaires leren over de gevoelswereld van katten en de intelligentie van de octopus. Met AI-toepassingen kunnen we...

Morgen gaan Saskia Arndt, Thijs Pepping en ik het hebben over de rol van #AI in dierenwelzijn bij @knaw-nl.bsky.social. De zaal is (bijna) vol, maar je kan nog een plaats bemachtigen! www.knaw.nl/bijeenkomste... #wetenschap #psychologie #biologie

26.01.2026 11:15 — 👍 0    🔁 0    💬 0    📌 0
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We can do without them: how the UG is cutting ties with Big Tech By 2030, the university aims to be digitally independent. And that’s not a pipe dream, say proponents of the plan.

University of Groningen: ⭐ no more big-tech by 2030 ⭐ Google Workplace 🚫 Windows 🚫 MS Office 🚫 ChatGPT 🚫 A huge challenge! Meeting culture won't get us there. Dedication and focus will. 💪🚀 Let's get to work.
ukrant.nl/magazine/we-... @rug.nl @rug-gmw.bsky.social #science

21.01.2026 15:38 — 👍 16    🔁 5    💬 0    📌 1
Vacancy — PhD Position in NeuroAI for Video Perception in the Human Brain <p><span>Are you interested in using AI to unravel the mysteries of the brain? Do you want to perform cutting-edge NeuroAI research and leverage deep learning to understand human vision? Then check out the vacancy below and apply for a PhD position in this exciting research direction.</span></p>

I have a PhD opening for my #VIDI BrainShorts project 📽️🧠🤖! Are you or do you know an ambitious, recent (or almost) MSc graduate with a background in NeuroAI and interest in large-scale data collection and video perception? Check out our vacancy! (deadline Feb 15).
werkenbij.uva.nl/en/vacancies...

16.01.2026 12:31 — 👍 30    🔁 26    💬 1    📌 0
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Donald J. Trump is the greatest danger to the world since Adolf Hitler What was once our greatest and most important ally is now the most powerful and dangerous criminal organization in the world. Donald Trump rules as a corrupt tyrant with a fascist playbook in his hand...

Awful but undeniable: "Once our greatest and most important ally. Now the most powerful and dangerous criminal organization in the world. Donald #Trump rules as a corrupt tyrant with a fascist playbook." decorrespondent.nl/16667/donald... By @robwijnberg.bsky.social on @decorrespondent.nl

17.01.2026 09:11 — 👍 0    🔁 0    💬 0    📌 0

I know! I'm curious to learn what you find. Good luck!

16.01.2026 08:03 — 👍 1    🔁 0    💬 0    📌 0

Re: the lord of the rings stories. These are part of Exp 2 but not analyzed separately.

16.01.2026 08:01 — 👍 1    🔁 0    💬 0    📌 0

Lack of variability can of course explain the null result, that's true. But in my view, the simplest and this most likely explanation is that there really is no between-subjects correlation there. Until I see compelling evidence otherwise.

16.01.2026 07:59 — 👍 0    🔁 0    💬 2    📌 0

* Vanbuckhave 😅

15.01.2026 09:53 — 👍 0    🔁 1    💬 0    📌 0

Perhaps of interest to @katechristodoulou.bsky.social @kerblooee.bsky.social @nadinedijkstra.bsky.social @rebecca-keogh.bsky.social

15.01.2026 09:52 — 👍 0    🔁 0    💬 1    📌 0

This suggests that pupil responses to bright or dark content are reliably different, but this difference is *not* a good measure of individual differences in mental imagery/ aphantasia as a personal trait. 3/3 🧵

15.01.2026 09:52 — 👍 1    🔁 0    💬 1    📌 0

… moment-to-moment fluctuations *within a participant* in self-reported vividness indeed predicted how strongly pupil size was affected by imagined brightness. However, individual differences *between participants* (also based on self-report) did not. 2/3 🧵

15.01.2026 09:52 — 👍 0    🔁 0    💬 1    📌 0
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Pupil size reflects moment-to-moment fluctuations in mental imagery, but not (or hardly) individual differences in imagery Previous research has shown that the eyes' pupils are larger when imaging dark as compared to bright objects or scenes. Based on this, it has been claimed that pupil size is a sensitive marker of ment...

🚨 #Preprint alert 🚨 A multilab study led by Claire Vanbuckave investigated whether the strength of pupil responses to imagined brightness/ darkness reflect differences in vividness of mental imagery. We found … 👇 1/3 🧵 #psychology #aphantasia #pupillometry #mentalimagery
doi.org/10.64898/202...

15.01.2026 09:52 — 👍 25    🔁 10    💬 2    📌 3

It's fashionable among animal-cognition researchers to claim that all higher cognitive abilities (empathy, irony, self control, planning, theory of mind, etc.) exist to some degree in all animals. Yet Donald Trump shows this is not true. QED

13.01.2026 16:44 — 👍 3    🔁 0    💬 0    📌 0
Animal Consciousness (first paragraph of the article).
First published Sat Dec 23, 1995; substantive revision Tue Jan 13, 2026.

Is there something it’s like to be an octopus, a bee, a snail? For much of the twentieth century, research into animal cognition tended to avoid questions of consciousness, following the lead of human neuroscience, where such questions were also marginalized (see the entries on animal cognition, methods in comparative cognition). However, the growing profile of consciousness science since 2000 has brought the topic of consciousness back into the scientific mainstream (see the entry on the neuroscience of consciousness), and this has led to resurgent interest in studying conscious experience in other animals.

Animal Consciousness (first paragraph of the article). First published Sat Dec 23, 1995; substantive revision Tue Jan 13, 2026. Is there something it’s like to be an octopus, a bee, a snail? For much of the twentieth century, research into animal cognition tended to avoid questions of consciousness, following the lead of human neuroscience, where such questions were also marginalized (see the entries on animal cognition, methods in comparative cognition). However, the growing profile of consciousness science since 2000 has brought the topic of consciousness back into the scientific mainstream (see the entry on the neuroscience of consciousness), and this has led to resurgent interest in studying conscious experience in other animals.

I've been working for ages on a comprehensive revamp of the Stanford Encyclopedia Entry on "Animal Consciousness", with new sections on non-Western perspectives, methodological challenges and evolutionary big pictures, and it's out today: plato.stanford.edu/entries/cons.... Hope you find it useful!

13.01.2026 15:00 — 👍 260    🔁 74    💬 3    📌 3

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