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Simon M. Hofmann

@smnhfmnn

Research in XAI @ Max Plack Institute for Human Cognitive & Brain Sciences @mpicbs.bsky.social | in the cinema @ Berlinale Generation

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20.09.2023
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Latest posts by Simon M. Hofmann @smnhfmnn

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Task learning increases information redundancy of neural responses in macaque visual cortex How does the brain optimize sensory information for decision-making in new tasks? One hypothesis suggests that learning reduces redundancy in neural representations to improve efficiency, whereas anot...

RIP redundancy reduction?

Beautiful work by Liu & colleagues showing that neural redundancy increases with learning, as predicted by a Bayesian model:
www.science.org/doi/10.1126/...

07.03.2026 11:08 πŸ‘ 64 πŸ” 24 πŸ’¬ 2 πŸ“Œ 1

Can you recommend papers in epidemiology/biomedicine that do causal inference on observational data and thoroughly and explicitly discuss their underlying causal model and assumptions ? @dingdingpeng.the100.ci #episky

06.03.2026 12:20 πŸ‘ 3 πŸ” 2 πŸ’¬ 3 πŸ“Œ 0
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GitHub - seelikat/neuro-visual-reconstruction-dataset-index: Index and overview of neuroimaging datasets for visual perception reconstruction. Index and overview of neuroimaging datasets for visual perception reconstruction. - seelikat/neuro-visual-reconstruction-dataset-index

Datasets for Reconstructing Visual Perception from Brain Data | Discussion

05.03.2026 17:40 πŸ‘ 4 πŸ” 2 πŸ’¬ 0 πŸ“Œ 0

Die EuropΓ€er sind ja *leider* nicht so β€œdumm” wie Amerikaner und Deutsche. Bei der Windstromerzeugung per Capita liegen die beiden Letzteren ja sogar klar vorne.

24.01.2026 15:03 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 1
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As always, my last post of the year reminder...

Reducing emissions will reduce future climate warming and impacts. The time is now. Visualization made by globalcarbonbudget.org.

Thanks for being here in 2025! I appreciate all the support πŸ™‚

01.01.2026 01:07 πŸ‘ 346 πŸ” 166 πŸ’¬ 6 πŸ“Œ 2

This week is ideal to draft your submission for the #MindBrainBody Symposium 2026 so that you can let it rest over the (potential) holidays and finalise it first thing in 2026 (deadline: January 8, 2026). πŸ˜‰

Looking forward to seeing you there and - in case - happy holidays! πŸŽ„πŸ§ πŸ«€πŸ«

18.12.2025 07:55 πŸ‘ 15 πŸ” 10 πŸ’¬ 0 πŸ“Œ 0

Congrats Erin! Was great to have briefly met again yesterday :) looking very much forward seeing the future work of your new lab

06.12.2025 22:41 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

(8/x)

03.12.2025 20:01 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
A Comparative Empirical Study of Relative Embedding Alignment in... We study representation alignment in neural forecasters using anchor-based, geometry-agnostic \emph{relative embeddings} that remove rotational and scaling ambiguities, enabling robust cross-seed...

Check her paper & poster here: openreview.net/forum?id=m4J...
Poster session on Sunday, Dec. 7 (unfortunately Deniz was not able to come either, so I happily collect your questions for her)
(9/x)

03.12.2025 20:01 πŸ‘ 1 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0
Predicting Microbial Interactions Using Graph Neural Networks Predicting interspecies interactions is a key challenge in microbial ecology, as these interactions are critical to determining the structure and activity of microbial communities. In this work, we...

And the excellent work by Deniz Kucukahmetler on a geometry-agnostic look at how neural models learn dynamics – where forecasting accuracy meets alignment, at the #NeurIPS workshop #NeurReps as well.
(8/x)

03.12.2025 20:01 πŸ‘ 2 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0
Predicting Microbial Interactions Using Graph Neural Networks Predicting interspecies interactions is a key challenge in microbial ecology, as these interactions are critical to determining the structure and activity of microbial communities. In this work, we...

Check her paper & poster here: openreview.net/forum?id=K4o...
Poster session of the workshop β€žNew Perspectives in Advancing Graph Machine Learningβ€œ on Sunday, Dec. 7 (unfortunately Elham was not able to come, so I happily collect your questions for her)
(7/x)

03.12.2025 20:01 πŸ‘ 2 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

First, the great work by my colleague Elham Gholamzadeh introducing a Graph Neural Network framework that leverages large-scale pairwise microbial interaction data to accurately predict both simple & complex interspecies interaction outcomes, outperforming traditional #ML approaches.
(6/x)

03.12.2025 20:01 πŸ‘ 1 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

(5/x) Check out further work from our group led my Nico Scherf at #NeurIPS:

03.12.2025 20:01 πŸ‘ 1 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

Super proud to have co-supervised this cool work with Nico Scherf! Also big thanks to @michaelgaebler.com for his great input to the project. 


There is even more to come …
(4/x)

03.12.2025 20:01 πŸ‘ 1 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0
Geometry matters: insights from Ollivier Ricci Curvature and Ricci... Representational similarity analysis (RSA) is widely used to analyze the alignment between humans and neural networks; however, conclusions based on this approach can be misleading without...

Check our paper & poster here: openreview.net/forum?id=fu0...
In case you are in San Diego, meet me on Sunday, Dec. 7, at our poster. (3/x)

03.12.2025 20:01 πŸ‘ 1 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

Led by Nahid Torbati, we propose novel geometric approaches using Ollivier Ricci Curvature & Ricci Flow for representational analysis of human-aligned #DL models that match human behavior in a large-scale perceptual paradigm exploring face similarity judgements under 2D&3D viewing conditions. (2/x)

03.12.2025 20:01 πŸ‘ 1 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0
Geometry matters: insights from Ollivier Ricci Curvature and Ricci... Representational similarity analysis (RSA) is widely used to analyze the alignment between humans and neural networks; however, conclusions based on this approach can be misleading without...

I’m very delighted to share the great news that we will present on this year’s #NeurIPS 2025 workshop on Symmetry and Geometry in Neural Representations (NeurReps).

openreview.net/forum?id=fu0...

(1/x)

03.12.2025 20:01 πŸ‘ 3 πŸ” 1 πŸ’¬ 1 πŸ“Œ 0
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When AI β€œthinks” like us New research forms a bridge between human and machine representation

When #AI β€œthinks” like us - New research out now in @nature.com from @lukasmut.bsky.social & @lampinen.bsky.social & @tuberlin.bsky.social & @mpib-berlin.bsky.social forms a bridge between #human and #machine representation. tinyurl.com/nhd4ycsh

13.11.2025 10:22 πŸ‘ 16 πŸ” 5 πŸ’¬ 0 πŸ“Œ 1
Starter Pack: Max Planck scientists on Bluesky

Starter Pack: Max Planck scientists on Bluesky

Many Max Planck scientists have started sharing their #research findings on #BlueSky. Follow their posts and join the conversation! πŸ‘‹ go.bsky.app/BYcBy6R #StarterPack

17.11.2025 11:15 πŸ‘ 116 πŸ” 41 πŸ’¬ 5 πŸ“Œ 2

Trying to build an experiment in Unity and slowly losing your patience?
Spoiler: that’s completely normal!

Meet EDIA - a modular framework for building studies in Unity.
🧩 Reusable modules
πŸ“Š Data sync
πŸ•ΆοΈ Multi-headset support

And yes, a β€œFind Waldo” demo is included - because science should be fun!

07.11.2025 16:37 πŸ‘ 6 πŸ” 3 πŸ’¬ 0 πŸ“Œ 0
TU Berlin For Future - Die Ringvorlesung zum Klimaschutz Teil 1 - im WiSe 25/26, ab dem 20.10.25 immer montags um 16:15, online via Zoom

TU Berlin For Future - Die Ringvorlesung zum Klimaschutz Teil 1 - im WiSe 25/26, ab dem 20.10.25 immer montags um 16:15, online via Zoom

Es ist Montag und wieder Zeit fΓΌr die #Klimaschutz #Ringvorlesung an der @tuberlin.bsky.social. Heute geht es um Finanzielle Bildung und Bildung fΓΌr nachhaltigen Konsum. Es referiert Prof. Ulf Schrader, Fachg. Arbeitslehre, Γ–konomie und nachhaltiger Konsum. Mehr Infos: www.tu.berlin/aloenk/studi...

03.11.2025 08:14 πŸ‘ 12 πŸ” 5 πŸ’¬ 0 πŸ“Œ 0
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How does subthalamic activity relate to Parkinson’s disease symptoms?

In a truly collaborative effort across #DBS centers, we aggregated a diverse dataset of invasive recordings from 119 patients.

Full article: doi.org/10.1101/2025...

Main findings πŸ§΅β¬‡οΈ

02.05.2025 08:16 πŸ‘ 12 πŸ” 7 πŸ’¬ 1 πŸ“Œ 2
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Nick (@willenjoy.bsky.social) is obsessed with signal-to-noise ratio (SNR). And for good reason! It could explain many results. Our simulation toolbox meegsim enables setting up SNR of individual sources as well as SNR of all signal sources with respect to all noise sources.
meegsim.readthedocs.io

17.10.2025 13:00 πŸ‘ 8 πŸ” 3 πŸ’¬ 0 πŸ“Œ 0
Logo of the MindBrainBody Symposium

Logo of the MindBrainBody Symposium

Nice things for the

**13th #MindBrainBody Symposium 2026**

happening under the hood 😊

Save the date: πŸ“† March 9-11, 2026 (Berlin and virtual)

Stay tuned for the call and announcement!

(For info about the last 12 MBBSymposia: mindbrainbody.de)

#interoception #neuroskyence

17.10.2025 09:39 πŸ‘ 32 πŸ” 10 πŸ’¬ 1 πŸ“Œ 0
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We're seeking the next Director of the Max Planck Institute for Psycholinguistics! Lead cutting-edge research in language & cognition. Nominations (incl. self) due 19 Dec 2025.
mpi.nl/career-education/vacancies/vacancy/nominations-and-self-nominations-sought-position-director-max

03.10.2025 07:53 πŸ‘ 40 πŸ” 45 πŸ’¬ 0 πŸ“Œ 2
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πŸ” Have we solved the replication crisis?

Join us for an IGOR panel discussion on the state of Open Science in biological psychology more than a decade after the crisis first hit.

πŸ“… Friday, 10 Oct | 10:00–11:00 CET
πŸ’» Online (contact us for the link)

#OpenScience #neuroskyence #academicsky

[1/3]

30.09.2025 10:07 πŸ‘ 32 πŸ” 24 πŸ’¬ 4 πŸ“Œ 4

In some way, it's trivial:

The #brain & the rest of the #body (e.g. the #heart) are coupled.

Yet, we spelled it out
w/ A. Villringer & V. Nikulin for current scientists (below)
w/ @martager.bsky.social @agatapatyczek.bsky.social @el-rei.bsky.social for future scientists bsky.app/profile/mart...

25.09.2025 07:43 πŸ‘ 51 πŸ” 20 πŸ’¬ 0 πŸ“Œ 1
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Frontiers | AffectTracker: real-time continuous rating of affective experience in immersive virtual reality Subjective experience is key to understanding affective states, characterized by valence and arousal. Traditional experiments using post-stimulus summary rat...

πŸ“’Our peer-reviewed article about the AffectTracker is finally out! πŸ˜²πŸ•ΉοΈπŸ“ˆ
Traditional methods for rating emotion often miss the dynamic, moment-to-moment nature of feelings. We designed a tool to capture this continuous affective experience in real-time during dynamic emotional stimulation.

23.09.2025 10:20 πŸ‘ 43 πŸ” 14 πŸ’¬ 2 πŸ“Œ 2

I am excited to share our latest research published in the EJEP! We used GAMMs to apply Rose’s theoretical work to prevention strategies targeting social isolation. Our results indicate that population strategies are more promising than individualized interventions.

22.09.2025 09:01 πŸ‘ 5 πŸ” 1 πŸ’¬ 1 πŸ“Œ 0
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Cognitive Neuroendocrinology - Get Involved!

We want to hear *your voice* on taboos in women's and gender diverse health! πŸ’¬πŸ§ Your perspective will directly inform priorities in research and a women's health resource platform. Find survey link at our website: www.cbs.mpg.de/cbs/en/resea...

19.08.2025 14:10 πŸ‘ 5 πŸ” 6 πŸ’¬ 1 πŸ“Œ 0