Lennart Wittkuhn
@lnnrtwttkhn.bsky.social
👨💻 Senior Specialist for Data & ML in the Public Sector | 🧠 Before: PostDoc in Computational Cognitive Neuroscience (Topics: Replay, Representations, Reproducibility) | 🏠 https://lennartwittkuhn.com
Reposted by Lennart Wittkuhn
🚀 We are hiring! 🚀
🔍 Join us as a Postdoctoral Researcher (fully-funded) at the Helmholtz Institute for Human-Centered AI in Munich.
🔍 Join us as a Postdoctoral Researcher (fully-funded) at the Helmholtz Institute for Human-Centered AI in Munich.
November 3, 2025 at 10:24 AM
🚀 We are hiring! 🚀
🔍 Join us as a Postdoctoral Researcher (fully-funded) at the Helmholtz Institute for Human-Centered AI in Munich.
🔍 Join us as a Postdoctoral Researcher (fully-funded) at the Helmholtz Institute for Human-Centered AI in Munich.
Reposted by Lennart Wittkuhn
Introducing CorText: a framework that fuses brain data directly into a large language model, allowing for interactive neural readout using natural language.
tl;dr: you can now chat with a brain scan 🧠💬
1/n
tl;dr: you can now chat with a brain scan 🧠💬
1/n
November 3, 2025 at 3:17 PM
Introducing CorText: a framework that fuses brain data directly into a large language model, allowing for interactive neural readout using natural language.
tl;dr: you can now chat with a brain scan 🧠💬
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tl;dr: you can now chat with a brain scan 🧠💬
1/n
Had a fantastic time giving a full-day workshop on Version Control with Git for Research @rtg2660.bsky.social @uni-wuerzburg.de 💫 Big thanks to organizer @leahilde.bsky.social! 🙏 As always, open materials at lennartwittkuhn.com/version-cont... 🌷
October 30, 2025 at 8:45 PM
Had a fantastic time giving a full-day workshop on Version Control with Git for Research @rtg2660.bsky.social @uni-wuerzburg.de 💫 Big thanks to organizer @leahilde.bsky.social! 🙏 As always, open materials at lennartwittkuhn.com/version-cont... 🌷
Reposted by Lennart Wittkuhn
Ten Simple Rules for AI-Assisted Coding in Science arxiv.org/abs/2510.22254 - our latest, led by @ericwbridgeford.bsky.social
Ten Simple Rules for AI-Assisted Coding in Science
While AI coding tools have demonstrated potential to accelerate software development, their use in scientific computing raises critical questions about code quality and scientific validity. In this pa...
arxiv.org
October 28, 2025 at 1:12 PM
Ten Simple Rules for AI-Assisted Coding in Science arxiv.org/abs/2510.22254 - our latest, led by @ericwbridgeford.bsky.social
Reposted by Lennart Wittkuhn
🚀 We’re hiring - Join our lab 🚀
🔍 Hiring: PhD (75% TV-L) & Postdoc (100% TV-L)
🧠 fMRI, VR, EEG, modelling
We combine a range of cognitive neuroscience methods to study flexible behaviour.
📅 Start: Feb 2026 or later | ⏳ Apply by Nov 3!
More details:
tinyurl.com/ms3a9ajt
#CognitiveNeuroscience
🔍 Hiring: PhD (75% TV-L) & Postdoc (100% TV-L)
🧠 fMRI, VR, EEG, modelling
We combine a range of cognitive neuroscience methods to study flexible behaviour.
📅 Start: Feb 2026 or later | ⏳ Apply by Nov 3!
More details:
tinyurl.com/ms3a9ajt
#CognitiveNeuroscience
October 27, 2025 at 11:57 AM
🚀 We’re hiring - Join our lab 🚀
🔍 Hiring: PhD (75% TV-L) & Postdoc (100% TV-L)
🧠 fMRI, VR, EEG, modelling
We combine a range of cognitive neuroscience methods to study flexible behaviour.
📅 Start: Feb 2026 or later | ⏳ Apply by Nov 3!
More details:
tinyurl.com/ms3a9ajt
#CognitiveNeuroscience
🔍 Hiring: PhD (75% TV-L) & Postdoc (100% TV-L)
🧠 fMRI, VR, EEG, modelling
We combine a range of cognitive neuroscience methods to study flexible behaviour.
📅 Start: Feb 2026 or later | ⏳ Apply by Nov 3!
More details:
tinyurl.com/ms3a9ajt
#CognitiveNeuroscience
Reposted by Lennart Wittkuhn
If you're an undergrad student in North America, UK or Ireland, consider coming to Hamburg for a cool DAAD internship on prediction error effects on memory! Hosted by yours truly, @nicoschuck.bsky.social & @stresscognition.bsky.social. 📨 until Nov 30: Hamburg_BI_0606 www.daad.de/rise/rise-germany
October 23, 2025 at 1:42 PM
If you're an undergrad student in North America, UK or Ireland, consider coming to Hamburg for a cool DAAD internship on prediction error effects on memory! Hosted by yours truly, @nicoschuck.bsky.social & @stresscognition.bsky.social. 📨 until Nov 30: Hamburg_BI_0606 www.daad.de/rise/rise-germany
Do you know the secret to training and testing reliable cross-condition decoders in neural data? 🧠 🔍
Take part in this Kaggle challenge and win up to 1000$! 💸
Very cool idea by @skjerns.de! ✨
Take part in this Kaggle challenge and win up to 1000$! 💸
Very cool idea by @skjerns.de! ✨
How well do classifiers trained on visual activity actually transfer to non-visual reactivation?
#Decoding studies often rely on training in one (visual) condition and applying it to another (e.g. rest-reactivation). However: How well does this work? Show us what makes it work and win up to 1000$!
#Decoding studies often rely on training in one (visual) condition and applying it to another (e.g. rest-reactivation). However: How well does this work? Show us what makes it work and win up to 1000$!
IMAGINE-decoding-challenge
Predict which words participants were hearing, based upon brain activity recordings of visually seeing these items?
www.kaggle.com
October 26, 2025 at 6:50 AM
Do you know the secret to training and testing reliable cross-condition decoders in neural data? 🧠 🔍
Take part in this Kaggle challenge and win up to 1000$! 💸
Very cool idea by @skjerns.de! ✨
Take part in this Kaggle challenge and win up to 1000$! 💸
Very cool idea by @skjerns.de! ✨
Reposted by Lennart Wittkuhn
🏡 🏳️🌈 ❤️ ☔ How to set up a transparent and supportive lab environment?
I would love to hear from you, PIs postdocs, students!
What are the things that work and that don't, what do you wish to have in place? Any examples of lab manuals?
Comments, DMs or emails welcome (ondrej.zika@pm.me)
I would love to hear from you, PIs postdocs, students!
What are the things that work and that don't, what do you wish to have in place? Any examples of lab manuals?
Comments, DMs or emails welcome (ondrej.zika@pm.me)
October 19, 2025 at 9:32 AM
🏡 🏳️🌈 ❤️ ☔ How to set up a transparent and supportive lab environment?
I would love to hear from you, PIs postdocs, students!
What are the things that work and that don't, what do you wish to have in place? Any examples of lab manuals?
Comments, DMs or emails welcome (ondrej.zika@pm.me)
I would love to hear from you, PIs postdocs, students!
What are the things that work and that don't, what do you wish to have in place? Any examples of lab manuals?
Comments, DMs or emails welcome (ondrej.zika@pm.me)
Reposted by Lennart Wittkuhn
😍 Our latest is out now in @commspsychol.nature.com. 🤩 We show with Bayesian modelling and experimental manipulation of uncertainty that developmental differences in social influence depend on differences in the internal uncertainty people have about their choice
doi.org/10.1038/s442...
doi.org/10.1038/s442...
Internal uncertainty impacts social information use in risky choice across adolescence - Communications Psychology
Adolescents’ choices are influenced by others. A social risky choice experiment and Bayesian modelling reveal that age differences in internal uncertainty, being unsure how to choose, relate to differences in susceptibility to social influence.
doi.org
September 29, 2025 at 9:07 AM
😍 Our latest is out now in @commspsychol.nature.com. 🤩 We show with Bayesian modelling and experimental manipulation of uncertainty that developmental differences in social influence depend on differences in the internal uncertainty people have about their choice
doi.org/10.1038/s442...
doi.org/10.1038/s442...
Feeling *gitty* about this fall with two exciting workshops on Version Control with Git for Scientists coming up @mpib-berlin.bsky.social and @rtg2660.bsky.social @uni-wuerzburg.de! ✨
Sounds interesting? Check out my website, where I share course materials: lennartwittkuhn.com 💫
#OpenScience #Git
Sounds interesting? Check out my website, where I share course materials: lennartwittkuhn.com 💫
#OpenScience #Git
Dr. Lennart Wittkuhn | Home
Research Data Scientist
lennartwittkuhn.com
September 25, 2025 at 12:58 PM
Feeling *gitty* about this fall with two exciting workshops on Version Control with Git for Scientists coming up @mpib-berlin.bsky.social and @rtg2660.bsky.social @uni-wuerzburg.de! ✨
Sounds interesting? Check out my website, where I share course materials: lennartwittkuhn.com 💫
#OpenScience #Git
Sounds interesting? Check out my website, where I share course materials: lennartwittkuhn.com 💫
#OpenScience #Git
Reposted by Lennart Wittkuhn
🚨 I am over the moon 🌓 to announce that I am joining University College Dublin @ucddublin.bsky.social as an Assistant Professor this fall to start the Uncertain Mind (UMI) lab 💫
I am looking for PhD/Postdoc candidates to join (more below 👇 ). Please RT as the deadline is pretty soon 🙏
I am looking for PhD/Postdoc candidates to join (more below 👇 ). Please RT as the deadline is pretty soon 🙏
September 24, 2025 at 3:18 PM
🚨 I am over the moon 🌓 to announce that I am joining University College Dublin @ucddublin.bsky.social as an Assistant Professor this fall to start the Uncertain Mind (UMI) lab 💫
I am looking for PhD/Postdoc candidates to join (more below 👇 ). Please RT as the deadline is pretty soon 🙏
I am looking for PhD/Postdoc candidates to join (more below 👇 ). Please RT as the deadline is pretty soon 🙏
Reposted by Lennart Wittkuhn
Delighted to share our work on replay and successor representations! We find replay during very short task pauses in human visual cortex that is linked to learning SRs & happens when learning is implicit. Study led by @lnnrtwttkhn.bsky.social
#compneuro #neuroskyence
www.pnas.org/doi/10.1073/...
#compneuro #neuroskyence
www.pnas.org/doi/10.1073/...
Replay in the human visual cortex during brief task pauses is linked to implicit learning of successor representations | PNAS
Humans can implicitly learn about multistep sequential relationships between events
in the environment from their statistical co-occurrence. Theore...
www.pnas.org
August 22, 2025 at 4:43 PM
Delighted to share our work on replay and successor representations! We find replay during very short task pauses in human visual cortex that is linked to learning SRs & happens when learning is implicit. Study led by @lnnrtwttkhn.bsky.social
#compneuro #neuroskyence
www.pnas.org/doi/10.1073/...
#compneuro #neuroskyence
www.pnas.org/doi/10.1073/...
Very glad to finally share our paper on replay and successor representation learning! ✨
Delighted to share our work on replay and successor representations! We find replay during very short task pauses in human visual cortex that is linked to learning SRs & happens when learning is implicit. Study led by @lnnrtwttkhn.bsky.social
#compneuro #neuroskyence
www.pnas.org/doi/10.1073/...
#compneuro #neuroskyence
www.pnas.org/doi/10.1073/...
Replay in the human visual cortex during brief task pauses is linked to implicit learning of successor representations | PNAS
Humans can implicitly learn about multistep sequential relationships between events
in the environment from their statistical co-occurrence. Theore...
www.pnas.org
August 24, 2025 at 6:32 AM
Very glad to finally share our paper on replay and successor representation learning! ✨
Check out this new preprint on factorized representations and generalization, led by the fabulous Sam Hall-McMaster (and selectively generalized bonus reading recommendations by @nicoschuck.bsky.social) ✨
Some similarities matter, others don’t—a great Labatut book with a yellow cover means books by Labatut are good, not yellow books are good. Factorized representations support such selective generalization. Check out our study on select. gen. by Sam HallMcMaster in collab with @gershbrain.bsky.social
Entorhinal cortex signals dimensions of past experience that can be generalised in a novel environment https://www.biorxiv.org/content/10.1101/2025.08.01.668096v1
August 3, 2025 at 8:53 PM
Check out this new preprint on factorized representations and generalization, led by the fabulous Sam Hall-McMaster (and selectively generalized bonus reading recommendations by @nicoschuck.bsky.social) ✨
Reposted by Lennart Wittkuhn
Excited to share our latest work spearheaded by @anikaloewe.bsky.social & @maritpetzka.bsky.social. 20 min naps increased the chance to solve an insight task if sleep reached N2 stage; but the EEG spectral slope was the best predictor of insight dx.plos.org/10.1371/jour...
#compneuro #psychscisky
#compneuro #psychscisky
N2 sleep promotes the occurrence of ‘aha’ moments in a perceptual insight task
Sleep supports memory consolidation, but can it also facilitate memory reorganization? This study reveals that N2 sleep, but not N1 sleep during a nap, increases the likelihood of having an 'aha' mome...
dx.plos.org
June 26, 2025 at 7:41 PM
Excited to share our latest work spearheaded by @anikaloewe.bsky.social & @maritpetzka.bsky.social. 20 min naps increased the chance to solve an insight task if sleep reached N2 stage; but the EEG spectral slope was the best predictor of insight dx.plos.org/10.1371/jour...
#compneuro #psychscisky
#compneuro #psychscisky
Reposted by Lennart Wittkuhn
preprint alert 🚨
1/ Can we accurately detect sequential replay in humans using Temporally Delayed Linear Modelling (#TDLM)? In our recent study, we could not find any replay and decided to dig deeper by running a hybrid simulation with surprising results. Link to preprint & details below 👇
1/ Can we accurately detect sequential replay in humans using Temporally Delayed Linear Modelling (#TDLM)? In our recent study, we could not find any replay and decided to dig deeper by running a hybrid simulation with surprising results. Link to preprint & details below 👇
June 16, 2025 at 7:22 AM
preprint alert 🚨
1/ Can we accurately detect sequential replay in humans using Temporally Delayed Linear Modelling (#TDLM)? In our recent study, we could not find any replay and decided to dig deeper by running a hybrid simulation with surprising results. Link to preprint & details below 👇
1/ Can we accurately detect sequential replay in humans using Temporally Delayed Linear Modelling (#TDLM)? In our recent study, we could not find any replay and decided to dig deeper by running a hybrid simulation with surprising results. Link to preprint & details below 👇
Reposted by Lennart Wittkuhn
🚨💫🤖 RLDM Workshop announcement:
"Game on: Leveraging Gamification in Cognitive and Computational Neuroscience"
Contributed talks submissions now OPEN: shorturl.at/0p0Jd
Looking forward to seeing you in Dublin!
w/ @luiantaverra.bsky.social & @ingrdmrtn.bsky.social
"Game on: Leveraging Gamification in Cognitive and Computational Neuroscience"
Contributed talks submissions now OPEN: shorturl.at/0p0Jd
Looking forward to seeing you in Dublin!
w/ @luiantaverra.bsky.social & @ingrdmrtn.bsky.social
February 21, 2025 at 10:12 AM
🚨💫🤖 RLDM Workshop announcement:
"Game on: Leveraging Gamification in Cognitive and Computational Neuroscience"
Contributed talks submissions now OPEN: shorturl.at/0p0Jd
Looking forward to seeing you in Dublin!
w/ @luiantaverra.bsky.social & @ingrdmrtn.bsky.social
"Game on: Leveraging Gamification in Cognitive and Computational Neuroscience"
Contributed talks submissions now OPEN: shorturl.at/0p0Jd
Looking forward to seeing you in Dublin!
w/ @luiantaverra.bsky.social & @ingrdmrtn.bsky.social
Reposted by Lennart Wittkuhn
🚨 Finally out! My new @annualreviews.bsky.social in Psychology paper:
www.annualreviews.org/content/jour...
We unpack why psych theories of generalization keep cycling from rigid rule-based models to flexible similarity-based ones, then culminating in Bayesian hybrids. Let's break it down 👉 🧵
www.annualreviews.org/content/jour...
We unpack why psych theories of generalization keep cycling from rigid rule-based models to flexible similarity-based ones, then culminating in Bayesian hybrids. Let's break it down 👉 🧵
February 10, 2025 at 2:46 PM
🚨 Finally out! My new @annualreviews.bsky.social in Psychology paper:
www.annualreviews.org/content/jour...
We unpack why psych theories of generalization keep cycling from rigid rule-based models to flexible similarity-based ones, then culminating in Bayesian hybrids. Let's break it down 👉 🧵
www.annualreviews.org/content/jour...
We unpack why psych theories of generalization keep cycling from rigid rule-based models to flexible similarity-based ones, then culminating in Bayesian hybrids. Let's break it down 👉 🧵
Is "Git-anuary" a thing? 🤔 Committing to finally learn Git (did you git the pun)? 💫
Anyway, last month we wrapped up two great courses: Full-semester course @uni-hamburg.de & 3-day course at ZI Mannheim! lennartwittkuhn.com/news/
As always, the Git journey continues in our Version Control Book 🚀
Anyway, last month we wrapped up two great courses: Full-semester course @uni-hamburg.de & 3-day course at ZI Mannheim! lennartwittkuhn.com/news/
As always, the Git journey continues in our Version Control Book 🚀
The Version Control Book
lennartwittkuhn.com
February 3, 2025 at 7:51 PM
Is "Git-anuary" a thing? 🤔 Committing to finally learn Git (did you git the pun)? 💫
Anyway, last month we wrapped up two great courses: Full-semester course @uni-hamburg.de & 3-day course at ZI Mannheim! lennartwittkuhn.com/news/
As always, the Git journey continues in our Version Control Book 🚀
Anyway, last month we wrapped up two great courses: Full-semester course @uni-hamburg.de & 3-day course at ZI Mannheim! lennartwittkuhn.com/news/
As always, the Git journey continues in our Version Control Book 🚀
Reposted by Lennart Wittkuhn
It’s a Preprint! 👋
We show how we can dissociate perceptual from value-based mechanisms of generalisation + that stronger gen. in anxiety is associated with value rather than perception.
w/
@ondrejzika.bsky.social @nicoschuck.bsky.social @bernhardspitzer.bsky.social
osf.io/preprints/ps...
1/n
We show how we can dissociate perceptual from value-based mechanisms of generalisation + that stronger gen. in anxiety is associated with value rather than perception.
w/
@ondrejzika.bsky.social @nicoschuck.bsky.social @bernhardspitzer.bsky.social
osf.io/preprints/ps...
1/n
OSF
osf.io
January 17, 2025 at 7:11 AM
It’s a Preprint! 👋
We show how we can dissociate perceptual from value-based mechanisms of generalisation + that stronger gen. in anxiety is associated with value rather than perception.
w/
@ondrejzika.bsky.social @nicoschuck.bsky.social @bernhardspitzer.bsky.social
osf.io/preprints/ps...
1/n
We show how we can dissociate perceptual from value-based mechanisms of generalisation + that stronger gen. in anxiety is associated with value rather than perception.
w/
@ondrejzika.bsky.social @nicoschuck.bsky.social @bernhardspitzer.bsky.social
osf.io/preprints/ps...
1/n
Reposted by Lennart Wittkuhn
🚨💫Check out our new work on perceptual and value-based mechanisms of aversive generalisation 👇
Project led by the truly outstanding @luiantaverra.bsky.social. #veryveryveryproudsupervisor Together with @nicoschuck.bsky.social and @bernhardspitzer.bsky.social
Project led by the truly outstanding @luiantaverra.bsky.social. #veryveryveryproudsupervisor Together with @nicoschuck.bsky.social and @bernhardspitzer.bsky.social
It’s a Preprint! 👋
We show how we can dissociate perceptual from value-based mechanisms of generalisation + that stronger gen. in anxiety is associated with value rather than perception.
w/
@ondrejzika.bsky.social @nicoschuck.bsky.social @bernhardspitzer.bsky.social
osf.io/preprints/ps...
1/n
We show how we can dissociate perceptual from value-based mechanisms of generalisation + that stronger gen. in anxiety is associated with value rather than perception.
w/
@ondrejzika.bsky.social @nicoschuck.bsky.social @bernhardspitzer.bsky.social
osf.io/preprints/ps...
1/n
OSF
osf.io
January 17, 2025 at 7:50 AM
🚨💫Check out our new work on perceptual and value-based mechanisms of aversive generalisation 👇
Project led by the truly outstanding @luiantaverra.bsky.social. #veryveryveryproudsupervisor Together with @nicoschuck.bsky.social and @bernhardspitzer.bsky.social
Project led by the truly outstanding @luiantaverra.bsky.social. #veryveryveryproudsupervisor Together with @nicoschuck.bsky.social and @bernhardspitzer.bsky.social
Reposted by Lennart Wittkuhn
Exciting PhD opportunities in various labs in Hamburg, including ours. Feel free to contact me regarding details. www.uni-hamburg.de/stellenangeb...
Ausschreibung
www.uni-hamburg.de
December 19, 2024 at 6:39 AM
Exciting PhD opportunities in various labs in Hamburg, including ours. Feel free to contact me regarding details. www.uni-hamburg.de/stellenangeb...
Reposted by Lennart Wittkuhn
🎄 Day 16 of our DRAdvent Calendar! 🎄
Comprehensive slides for a 3 hour workshop on Data Version Control, Computational Reproducibility, Good Coding Practices, and Open Platforms by DRA Trainer, @likeajumprope.bsky.social ! 💻✨
Check out Johanna’s slides here: https://zenodo.org/records/14268445
Comprehensive slides for a 3 hour workshop on Data Version Control, Computational Reproducibility, Good Coding Practices, and Open Platforms by DRA Trainer, @likeajumprope.bsky.social ! 💻✨
Check out Johanna’s slides here: https://zenodo.org/records/14268445
December 16, 2024 at 4:03 PM
🎄 Day 16 of our DRAdvent Calendar! 🎄
Comprehensive slides for a 3 hour workshop on Data Version Control, Computational Reproducibility, Good Coding Practices, and Open Platforms by DRA Trainer, @likeajumprope.bsky.social ! 💻✨
Check out Johanna’s slides here: https://zenodo.org/records/14268445
Comprehensive slides for a 3 hour workshop on Data Version Control, Computational Reproducibility, Good Coding Practices, and Open Platforms by DRA Trainer, @likeajumprope.bsky.social ! 💻✨
Check out Johanna’s slides here: https://zenodo.org/records/14268445
We could basically get reproducibility checks for free, if papers were computational notebooks (Jupyter, Quarto, RMarkdown, etc.), only successfully rendered versions accepted for publication and everything automated via pull request triggered CI/CD pipelines.
„Maybe reproducibility should have a practical expiration date anyway, since it’s mostly useful around the time of publication.“
I agree. Maintaining reproducibility for decades is great but hard. It should be verified at the time of publication. But who does it? Journals? Reviewers?
I agree. Maintaining reproducibility for decades is great but hard. It should be verified at the time of publication. But who does it? Journals? Reviewers?
I failed to reproduce my results from a decade ago: petebachant.me/failed-to-re...
I want to start doing these little #reproducibility side quests with other people's work. Anyone have any suggestions?
I want to start doing these little #reproducibility side quests with other people's work. Anyone have any suggestions?
December 8, 2024 at 8:50 AM
We could basically get reproducibility checks for free, if papers were computational notebooks (Jupyter, Quarto, RMarkdown, etc.), only successfully rendered versions accepted for publication and everything automated via pull request triggered CI/CD pipelines.
„Maybe reproducibility should have a practical expiration date anyway, since it’s mostly useful around the time of publication.“
I agree. Maintaining reproducibility for decades is great but hard. It should be verified at the time of publication. But who does it? Journals? Reviewers?
I agree. Maintaining reproducibility for decades is great but hard. It should be verified at the time of publication. But who does it? Journals? Reviewers?
I failed to reproduce my results from a decade ago: petebachant.me/failed-to-re...
I want to start doing these little #reproducibility side quests with other people's work. Anyone have any suggestions?
I want to start doing these little #reproducibility side quests with other people's work. Anyone have any suggestions?
I failed to reproduce my own results from a decade ago
petebachant.me
December 8, 2024 at 8:16 AM
„Maybe reproducibility should have a practical expiration date anyway, since it’s mostly useful around the time of publication.“
I agree. Maintaining reproducibility for decades is great but hard. It should be verified at the time of publication. But who does it? Journals? Reviewers?
I agree. Maintaining reproducibility for decades is great but hard. It should be verified at the time of publication. But who does it? Journals? Reviewers?