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Sebastian Hellmann

@sehellmann.bsky.social
150 followers 222 following 16 posts

PostDoc working at TU Munich. Interested in on computational modelling, decision-making, and confidence. Cat owner, Ireland lover and brass music fan

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Nuno Busch @nunobusch.bsky.social · 18/09/2026
🎁 Best birthday present this week was finally finishing and preprinting this big project: Together with @thorstenpachur.bsky.social, we investigated how loss aversion in risky choice is affected by how we learn about our options. 📖 Full-text here: lnkd.in/eKu2AEwB
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Jordan Deakin @jordantdeakin.bsky.social · 17/09/2026
📣 NEW PREPRINT ALERT! 📣 📝Preprint: www.biorxiv.org/content/10.6... When choosing between options with multiple attributes, what does the brain actually compare - individual attributes or integrated option values? We combined EEG + eye-tracking to find out... and found evidence for the latter 🧠
biorxiv.org
Fixation-evoked potentials reveal neural signatures of hierarchical value-integration during decision-making
Many decisions require maintaining beliefs across multiple levels of representation, from sampling and integrating information to forming action plans. To elucidate these processes and reveal the neur...
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Wouter Kool @wouterkool.bsky.social · 15/09/2026
I expect to recruit a PhD student this cycle! The Control and Decision Making Lab at WashU studies control, effort, and decision making, combining behavioral experiments with modeling and neuroimaging. If that sounds cool, check out our work: cdmlab.wustl.edu. How to apply: psych.washu.edu/apply
cdmlab.wustl.edu
Control and Decision Making Lab
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Horrible 'Antigonish' Horse 🇵🇸 @horriblehorse.bsky.social · 12/09/2026
THIS is the tech that should be getting heavy development. Not LLM data centers that ruin communities, destroy farmland and kill the planet
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Alireza Modirshanechi @modirshanechi.bsky.social · 15/08/2026
Excited to share that I'll be starting as a junior professor and Emmy Noether awardee at the University of Göttingen this October! 🥳 🚀 I'll be hiring #phd students and #postdoc across #machinelearning, #neuroscience and #cogsci: modirlab.github.io/open-positio... Please spread the word! 🙏
PhD ad informationPostdoc ad informationInformation about Göttingen and equal opportunities
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Zachary Tefertiller @zachtefertiller.bsky.social · 26/08/2026
Excited to share our new preprint! 🎈 We reversed risk contingencies in the Balloon Analogue Risk Task and used computational models to reveal latent risk-taking mechanisms missed by standard measures. Huge thanks to @franziskaknolle.bsky.social & @thorstenpachur.bsky.social! osf.io/preprints/ps...
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Sebastian Hellmann @sehellmann.bsky.social · 25/08/2026
Happy to share the result of a fruitful collaboration with @carinafo.bsky.social out in Computational Brain & Behavior: Two Paths to Bias: Distinct Influences of Stimulus Probability and Previous Choice on Drift Diffusion Parameters (link.springer.com/article/10.1...)
link.springer.com
Two Paths to Bias: Distinct Influences of Stimulus Probability and Previous Choice on Drift Diffusion Parameters - Computational Brain & Behavior
Perceptual decisions are shaped by prior information and choice history, yet their distinct computational implementations remain unclear. Here, we jointly model these sources of bias using hierarchica...
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Grüne im Bundestag @gruene-bundestag.de · 03/08/2026
Reihenweise Atomkraftwerke in Staaten wir Ungarn, Rumänien und Frankreich gehen wegen der Hitzewelle und niedriger Wasserstände in den Flüssen in die Knie. In Ungarn löst das gerade eine riesige Energiekrise mit explodierenden Strompreisen und Engpässen aus.
Auf sandfarbenem Hintergrund ist ein Meme aus der Serie Die Simpsons abgebildet. Darauf tauscht ein Mitarbeiter des Atomkraftwerkes ein Schild auf dem eine Null ist gegen ein anderes Schild auf dem auch eine Null ist aus. Rechts daneben steht geschrieben „Days without Beweis, dass Atomkraft keine Zukunft hat“. Darunter sind drei Schlagzeilen aus Online-Presseartikeln eingeblendet. Sie lauten: „Notstand in Ungarn und Rumänien: Osteuropäische Atomkraftwerke versagen in der Hitze“, „Energiekrise in Ungarn: AKW-Ausfall bringt das Land an seine Grenzen“ und „Niedriger Flusspegel: Auch Rumänien und Ungarn drosseln Atomkraftwerke“.
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European Society for Cognitive Psychology @escop.bsky.social · 15/07/2026
TeaP 2027 (Tagung experimentell arbeitender Psycholog:innen /Conference of experimental psychologists) Mannheim, Germany 21-24 March 2027 Contributions welcome from all topics in Experimental Psychology and neighbouring fields using the experimental method.
uni-mannheim.de
TeaP 2027
Die Tagung experimentell arbeitender Psycholog*innen findet vom 21. - 24. März 2027 an der Universität in Mannheim statt
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Matan Mazor @matanmazor.bsky.social · 20/06/2026
A bee analogue of Kohler's insight learning experiments
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The R Foundation @r-foundation.bsky.social · 17/06/2026
The 2026 Rousseeuw Prize for Statistics has been awarded to the R Project. #RStats www.rousseeuwprize.org/2026
rousseeuwprize.org
The Rousseeuw Prize for Statistics
The Rousseeuw Prize for Statistics is a biennial prize to celebrate outstanding contributions to statistics research.
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Marcel Binz @marcelbinz.bsky.social · 09/06/2026
Excited to announce that I'll be starting my own lab in Tübingen this October! Hiring at all levels: Postdoc, PhD & RA. Want to work on computational cognitive science at scale? Apply: core-cognition.github.io Reposts and shares much appreciated 🙏
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David Soto @dsotob.bsky.social · 15/06/2026
RA position open at @BCBL_eu (San Sebastian, Spain)! Work on decoded neurofeedback, fMRI/fNIRS/EEG, and ML to study how subjective experience can be shaped. 2-yr contract, starts Sept. 2026. Deadline: June 30. Apply here shorturl.at/Xw4pn Please RT! @hakwan.bsky.social @meganakpeters.bsky.social
shorturl.at
JOB OFFER RESEARCH ASSISTANT - CONSCIOUSNESS Research group (D.S.)
at the BCBL- Basque Center on Cognition Brain and Language (San Sebastián, Basque Country, Spain) www.bcbl.eu The Basque Center on Cognition Brain and Language (BCBL) in San Sebastian (Basque Country,...
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Manuel Rausch @manurausch.bsky.social · 14/05/2026
Our paper about the dynConfiR package, headed by the @sehellmann.bsky.social, is now out in Behavior Research Methods: link.springer.com/article/10.3.... The dynConfiR package can be used to fit dynamical models of binary choices, reaction time, and decision confidence.
link.springer.com
dynConfiR: An R package for sequential sampling models of decision confidence - Behavior Research Methods
The modeling of response times using sequential sampling models has a long history. Because choices, confidence judgments, and reaction times are closely linked in perceptual decisions, it seems only ...
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Elisabeth Sterner @esterner.bsky.social · 14/04/2026
🚨 Our database is published in Behavior Research Methods: link.springer.com/article/10.3... with Maximilian Stadler and @franziskaknolle.bsky.social If you plan on working with German speech stimuli, check out our osf for auditory stimuli and our online tool for selecting sentence material 🪄
link.springer.com
Munich Sentence (MuSe) Database: Completion norms and audio recordings for 619 German sentences - Behavior Research Methods
Prediction is a core feature of language, which is widely studied across research domains. The Munich Sentence (MuSe) database enhances reproducibility by providing sentence completion norms for 619 G...
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Dr. Jens Foell @jensfoell.de · 07/04/2026
I want diplomats recalled from the US. I want renegotiations about US bases in Europe. I want an official boycott of the World Cup by all participating nations. I want new articles of impeachment filed every single day. Play time is over. Act like adults or make way for those who do.
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Richard McElreath 🐈‍⬛ @rmcelreath.bsky.social · 07/04/2026
I would have preferred to have the "draw the rest of the owl" meme on the cover, but this will do. Seems like it is on schedule, and we'll leave some typos so you know we didn't write it with AI.
cover of the book "Bayesian Workflow" by Gelman, Vehtari, et al. Coming out later this year, in the summer probably.
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Ulrich Ettinger @ulrichettinger.bsky.social · 02/03/2026
I am thrilled to announce the European Summer School on Eye Movements! #ESSEM2026 takes place 7-12 September, 2026, at the Institute of Psychiatry, Psychology & Neuroscience, King’s College London. Further details including info on how to register can be found here: essem2026.org
essem2026.org
ESSEM 2026 – Summer School
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WeRateDogs @weratedogs.com · 25/03/2026
A viral dog rescue from 2016 is now immortalized with a statue in Kazakhstan. When a dog fell into the Sayran reservoir, bystanders formed a human chain to pull him to safety. The statue is a reminder of the value of unity, solidarity and collective action. 14/10 for all
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Sebastian Gluth @sgluth.bsky.social · 23/03/2026
How do people search for information to make efficient decisions? Our new theory, now out in Psychological Review, suggests that an efficient search rule is (at the core of) the answer. And eye-tracking data support our theory. Check out here (it's open access): psycnet.apa.org/fulltext/202...
psycnet.apa.org
APA PsycNet
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Lilly Roth @lillyroth.bsky.social · 19/03/2026
@teap2026.bsky.social is over: 4 days, 10 workshops, 1 public lecture by @jensfoell.de, 3 keynotes, 80 talk sessions, and 3 poster sessions 👍🏼 Co-organizing this international experimental-psychology conference with Franziska Rück and Barbara Kaup, we brought over 700 researchers to Tübingen 😊
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Jennifer March @jennamarch.bsky.social · 16/03/2026
Curious about how context influences decision-making? 👀🧠 Make sure to check out our symposium on Wednesday 11:00-12:30 at Room N2 #TeaP2026 Featuring✨ @tiborstoe.bsky.social @nunobusch.bsky.social @dmding.bsky.social @barbaraoberbauer.bsky.social
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Renato Duarte @rcfduarte.bsky.social · 11/03/2026
I tracked every keyword in 22 years of Cosyne abstracts to map how computational neuroscience evolved — from Bayesian brains to neural manifolds to LLMs — and where it's heading next.
open.substack.com
22 years of Brain Science: what CoSyNe tells us about the evolution of Neuroscience
Tracking the intellectual DNA of Computational and Systems Neuroscience through its flagship meeting
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Kai Xue @kaixue98.bsky.social · 25/02/2026
Our new paper is out in Cognition! What determines whether confidence follows the classic "folded-X" pattern vs. the "double-increase" pattern? The answer lies in the type of stimulus manipulation. Big thanks to my advisor Doby @dobyrahnev.bsky.social and co-first author @herrickfung.bsky.social !
sciencedirect.com
Stimulus reliability but not boundary distance manipulations violate the folded-X pattern of confidence
The folded-X pattern has been identified as a critical signature of confidence: as conditions become easier, confidence increases for correct trials b…
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Cognitive Modelling & Decision Neuroscience Lab @cmdn-lab.bsky.social · 25/02/2026
Yesterday, we finally got to celebrate the successful PhD defense of our PostDoc @maryamtohidi.bsky.social at a delicious Iranian restaurant😋 We are so proud of Dr Tohidimoghaddam, who continues her journey with us elucidating multi-attribute decision-making🧠 Stay tuned for her future contributions!
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xkcd Bot @xkcd-bot.bsky.social · 20/02/2026
Eliminating the Impossible xkcd.com/3210 'If you've eliminated a few possibilities and you can't think of any others, your weird theory is proven right' isn't quite as rhetorically compelling. Explain xkcd: www.explainxkcd.com/wiki/index.php/…
'If you've eliminated a few possibilities and you can't think of any others, your weird theory is proven right' isn't quite as rhetorically compelling.
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Richard D. Morey @richarddmorey.bsky.social · 17/02/2026
poor bee GOLD_07, whose embarrassing mistake has been immortalised in a way beyond his comprehension
Except from Stentiford et al (page 4): "We largely observed high within-bee consistency. The exception, bee GOLD_07, had inconsistent inbound flights over the cornfield but, like other bees, converged tightly at the west side of the tree before the hive (Figure S2A). GOLD_07 also performed the only outbound flight recorded that overshot the feeder (Figure S1B). Intriguingly, in this failed flight, GOLD_07 took a different route (‘wide of the hedge’) compared to the previously recorded outbound flight (‘over the hedge’). Perhaps suggesting GOLD_07 failed to find the feeder due to an error in estimating position. We note that this flight displayed prominent oscillations after the bee failed to find the feeder, consistent with exploratory search behavior. Oscillatory paths are well documented in walking insects [21–23] (see [24] for review). Similar ocillatory looping search patterns have been seen in flying bees in previous lab [25,26] and field settings [27,28], including honey bees tracked with harmonic radar [29]. Our observations of GOLD_07 suggest that oscillations may also be important for exploratory or search behavior in bees and warrant further investigation. Computational and robotic models indicate that oscillations can be useful beyond exploration, such as in visual route following by improving view matching, familiarity-based guidance, and optic flow for altitude control [30–36]. However, the oscillations in this one outbound flight of GOLD_07 are a notable exception compared to the majority of flights in which oscillations are much less prominent."
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Dr Mircea Zloteanu 🌺🌞🍃 @mzloteanu.bsky.social · 09/02/2026
Compositional data (proportions that sum to 1) behave in ways standard models aren’t built for I walk through why Dirichlet regression is often the right tool & what extra insight it gives using a real ex of eyetracking #Dirichlet #r #brms #guide #eyetracking open.substack.com/pub/mzlotean...
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Helen Blank @helenblank.bsky.social · 12/01/2026
How do priors influence speech processing? Do they enhance expected signals or highlight the unexpected (prediction errors)? @fabianschneider.bsky.social' s work shows: It depends!
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Linus Hof @linushof.bsky.social · 17/12/2025
New article in Cognitive Psychology with @thorstenpachur.bsky.social and Veronika Zilker: “How sampling strategies shape experience-based risky choice.” We present a computational framework for information search and choice in decisions from experience. 1/4 doi.org/10.1016/j.co...
article cover page and abstract
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Carl T. Bergstrom @carlbergstrom.com · 11/12/2025
Computer scientists: "So with machine learning we can extract subtle patterns from massive datasets. What shall we do with it?" Business school professors, every single time: "You know, I think phrenology got a raw deal in the late 1800s."
knowledge.wharton.upenn.edu
Can Your Face Predict Your Salary? Using AI Personality Assessments in Hiring
A new study from Wharton faculty explores how AI can extract personality traits from facial images — and what that means for your career.
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Chaz Firestone @chazfirestone.bsky.social · 02/12/2025
Well this is exciting! The Department of Psychological & Brain Sciences at Johns Hopkins University (@jhu.edu) invites applications for a full-time tenured or tenure-track faculty member in Cognitive Psychology, in any area and at any rank! Application + more info: apply.interfolio.com/178146
apply.interfolio.com
Apply - Interfolio {{$ctrl.$state.data.pageTitle}} - Apply - Interfolio
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DER SPIEGEL @spiegel.de · 28/11/2025
Grüne vollziehen Kehrtwende bei der Homöopathie: Am ersten Tag des Grünen-Parteitags in Hannover wird es lebhaft: Ein Antrag wird angenommen, der die Finanzierung homöopathischer Leistungen durch gesetzliche Krankenkassen untersagen will. Eine historische Kehrtwende.
spiegel.de
Grüne vollziehen Kehrtwende bei der Homöopathie
Am ersten Tag des Grünen-Parteitags in Hannover wird es lebhaft: Ein Antrag wird angenommen, der die Finanzierung homöopathischer Leistungen durch gesetzliche Krankenkassen untersagen will. Eine historische Kehrtwende.
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Stephen Turner @stephenturner.us · 21/11/2025
Science in 2025
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Dr. Drew Brayshaw 🌊🪨 @drewbrayshaw.bsky.social · 12/11/2025
Still think this was one of the best power moves of all time www.sciencedirect.com/science/arti...
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TeaP 2026 @teap2026.bsky.social · 12/11/2025
📢 The #TeaP2026 talk & poster submission deadline is approaching fast! ⏰ Don’t miss your chance – submit your contribution by November 16: coms.app/teap26/ 👍🏼
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Pause @ Real Scientists DE @realscientists.de · 11/11/2025
Wir starten mit der ersten Seite der Doktorarbeit von Paul Langerhans, dem Entdecker der pankreatischen Inseln. Lief wohl alles nicht so rund und ich mag diesen Satz sehr: "Der einzige Zweck dieser Entstehungsgeschichte meiner Arbeit ist Motivierung und Entschuldigung ihres geringen Gehaltes."
Foto von Paul Langerhans und Titel- und erste Seite seiner Doktorarbeit "Beiträge zur mikroskopischen Anatomie der Bauchspeicheldrüse". Der Satz "Der einzige Zweck dieser Entstehungsgeschichte meiner Arbeit ist Motivierung und Entschuldigung ihres geringen Gehaltes." ist rot markiert.
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Michael E. Mann @michaelemann.bsky.social · 31/10/2025
"You can’t reboot the planet if you crash it" | My commentary on Bill Gates' flawed new climate missive for @thebulletin.org: thebulletin.org/2025/10/you-...
thebulletin.org
You can’t reboot the planet if you crash it
What Gates is putting forward aren’t legitimate arguments that can be made in good faith. They are shopworn fossil fuel industry talking points.
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Simon Schultz @simonschultz.bsky.social · 28/12/2024
Another good reason to kill this whole industry now. It’s going to fail anyway, we may as well do so while we still have a chance to restore the planet.
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Basti @gorsi.bsky.social · 27/10/2025
Kurzgesagt - in a nutshell explains perfectly why AI in such Context is really problematic. Also John Oliver from Last week tonight did a really good video about AI Slop and how many think it's real.
youtu.be
AI Slop Is Destroying The Internet
YouTube video by Kurzgesagt – In a Nutshell
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Gavin Buckingham @drgbuckingham.bsky.social · 25/10/2025
For your enjoyment (by @jagarikin)
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Rasmus Bruckner @rasmusbruckner.bsky.social · 21/10/2025
Our new paper is out as a reviewed preprint in @elife.bsky.social! elifesciences.org/reviewed-pre... Congrats to @hashimsat.bsky.social and our amazing collaborators on this great team effort. Special shout-out to @haukeren.bsky.social, who made this possible through his generous support 🙌
elifesciences.org
Absence of Systematic Effects of Internalizing Psychopathology on Learning Under Uncertainty
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Dr. Jens Foell @jensfoell.de · 15/10/2025
Award-winning pain researcher here. This is not something that can be done. Hope this helps.
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herrick fung @herrickfung.bsky.social · 12/10/2025
Glad to see my first-year project is out! In two experiments, we manipulated multiple stimulus features in a perception task, yet their effects on confidence and accuracy fell into just two distinct behavioral patterns, offering a way to predict the effects of novel stimulus manipulations. 1/n
sciencedirect.com
Similarities and differences in the effects of different stimulus manipulations on accuracy and confidence
Visual stimuli can vary in multiple dimensions that affect accuracy and confidence in a perceptual decision-making task. However, previous studies hav…
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ranimo.bsky.social @ranimo.bsky.social · 08/10/2025
⭐PhD in Cognitive/Computational Psychology⭐, Please Share!! Use Reinforcement Learning and Computational Modelling to study how dis/misinformation affects us (with myself +Tali Sharot). Full funding for those eligible for UK home fees. Deadline 10th Nov. @queenmarycbb.bsky.social
findaphd.com
Characterising Cognitive Biases Elicited by Misinformation Using Reinforcement Learning at Queen Mary University of London on FindAPhD.com
PhD Project - Characterising Cognitive Biases Elicited by Misinformation Using Reinforcement Learning at Queen Mary University of London, listed on FindAPhD.com
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Franziska Knolle @franziskaknolle.bsky.social · 28/09/2025
If you’re in #Munich 🥨 and curious about decision-making, perception, and cognition through a translational lens, join us for a seminar I’m hosting on Oct 30 with three fantastic speakers: @jkesby.bsky.social (visiting from 🇦🇺), @miguelbengala.bsky.social, and @jacob-lab.bsky.social 🧠💡
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Nathalie Lawhead @alienmelon.bsky.social · 28/09/2025
you heard of running Doom on random gadgets but have you ever heard of… “Hosting a WebSite on a Disposable Vape” bogdanthegeek.github.io/blog/project... this explains how! ((the internet is healing 😌)) #IndieDev
bogdanthegeek.github.io
Hosting a WebSite on a Disposable Vape
Someone's trash is another person's web server.
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Richard McElreath 🐈‍⬛ @rmcelreath.bsky.social · 27/09/2025
Just back from this - I was the misfit invited speaker who knows nothing about psychology. It was really educational for me, expanded my view of theory construction problems in the human sciences.
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Kobe Desender @kobedesender.bsky.social · 25/09/2025
Introducing hMFC: A Bayesian hierarchical model of trial-to-trial fluctuations in decision criterion! Now out in @plos.org Comp Bio. led by Robin Vloeberghs with @anne-urai.bsky.social Scott Linderman Paper: desenderlab.com/wp-content/u... Thread ↓↓↓ #PsychSciSky #Neuroscience #Neuroskyence
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Kobe Desender @kobedesender.bsky.social · 25/09/2025
"Learning to be confident: How agents learn confidence based on prediction errors"! Now out in @cognitionjournal.bsky.social led by @pierreledenmat.bsky.social Paper: desenderlab.com/wp-content/u... Thread ↓↓↓ #AcademicSky #PsychSciSky #Neuroscience #Neuroskyence
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