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Posts by Martin Hebart

Just in time for my PhD defense, the work I started during my visiting PhD in the lab of Martin Hebart at Giessen University is available as a preprint! www.biorxiv.org/content/10.6...

6 days ago 20 4 1 0

Hold my beer…

1 week ago 1 0 0 0
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New paper! 🚨 ~1.8K Mooney images from THINGS + ~1K participants to study visual ambiguity resolution.

Results suggest the visual system shifts from a top-down guess to bottom-up matching after disambiguation, and a U-shaped link between info gain and identification.

www.nature.com/articles/s44...

1 month ago 56 26 1 2

Dear Guido, I am incredibly sorry for your loss and speechless. Let me know if there is anything I can do to help. ❤️

1 month ago 1 0 0 0
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We've posted a new fMRI study of semantic relations (has-part, is-a, made-of, etc.), a key aspect of language. We find that relations are represented in the same brain regions as are other semantic concepts, though voxels tend to be selective for only one relation or another.
doi.org/10.64898/202...

1 month ago 64 26 2 2

Interesting work! The link didn’t work for me, so I’ll repost it here in case it’s the same issue for anyone else: www.biorxiv.org/node/5254288...

1 month ago 6 0 0 0

This wins the internet for me.

2 months ago 6 2 0 0

OK, my son just complained he no longer sees the "teeth", so somewhere around the age of 4-5, likely his prior became too strong for him to see the alternative interpretation. The Batman logo is now no longer bistable for him.

2 months ago 2 0 0 0
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1/7 Can infants recognise the world around them? 👶🧠 As part of the FOUNDCOG project, we scanned 134 awake infants using fMRI. Published today in Nature Neuroscience, our research reveals 2-month-old infants already possess complex visual representations in VVC that align with DNNs.

2 months ago 155 70 4 8
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High-dimensional structure underlying individual differences in naturalistic visual experience Han and Bonner reveal that individual visual experience arises from high-dimensional neural geometry distributed across multiple representational scales. By characterizing the full dimensional spectru...

Human visual cortex representations may be much higher-dimensional than earlier work suggested, but are these higher dimensions of cortical activity actually relevant to behavior? Our new paper tackles this by studying how different people experience the same movies. 🧵 www.cell.com/current-biol...

2 months ago 60 16 2 2

Finally out in eLife!!
"Early foveal cortex predicts the features of saccade targets through feedback from higher cortical areas."
elifesciences.org/articles/107...

2 months ago 30 11 0 0
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🚨 New paper out in Science Advances 🚨
With @suryagayet.bsky.social and @peelen.bsky.social, in two fMRI studies we investigate mental object rotations that are driven by the scene context, rather than purely by cognitive operations. 🧵 www.science.org/doi/10.1126/...

2 months ago 56 18 2 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...

3 months ago 31 26 1 0

Why you shouldn’t trust data collected on Mturk (anymore):

link.springer.com/article/10.3...

While this work highlights problems with Mturk, it also depends on the task & filtering.

That said, we have also migrated to @cloudresearch.bsky.social Connect for data quality like in the good old days!

3 months ago 9 0 2 0

Now in press at Nature Communications!
www.nature.com/articles/s41...
Check it out if you are interested in category selectivity, the organization of visual cortex, and topographic models!

4 months ago 22 8 0 0
A teaser figure showing the process of metamers rendered differentially (MRD). Target scene parameters are used to render a target scene. A new scene is initialized from some starting point, and renders are created from this scene. The loss between the initial and target scenes is measured. MRD allows the gradients wrt the loss to be propagated to the scene parameters (e.g. lighting, geometry or material) for gradient-based optimization.

A teaser figure showing the process of metamers rendered differentially (MRD). Target scene parameters are used to render a target scene. A new scene is initialized from some starting point, and renders are created from this scene. The loss between the initial and target scenes is measured. MRD allows the gradients wrt the loss to be propagated to the scene parameters (e.g. lighting, geometry or material) for gradient-based optimization.

Legit super excited about this work coming out. My amazing doctoral student @ben.graphics has been working on an idea to use physically based differentiable rendering (PBDR) to probe visual understanding. Here, we generate physically-grounded metamers for vision models. 1/4

arxiv.org/abs/2512.12307

4 months ago 53 15 4 3

But it always comes back 😅

4 months ago 0 0 0 0
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Ok, this is nuts. Once you see it you cannot unsee it. Do you see it?
(OP @drgbuckingham.bsky.social )

4 months ago 362 105 50 52
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Dispute erupts over universal cortical brain-wave claim The debate highlights opposing views on how the cortex transmits information.

A “universal” pattern of cortical brain oscillations may be less ubiquitous than previously proposed.

By @claudia-lopez.bsky.social

#neuroskyence

www.thetransmitter.org/brain-waves/...

4 months ago 33 12 1 1
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🚨 🆕 Preprint 🚨

How does the brain represent natural images?

Using MEG + multivariate analysis, we disentangle contributions of retinotopy, spatial frequency, shape, and texture

Together, our results reveal how visual features jointly and dynamically support human object recognition.

link 👇

4 months ago 39 12 1 0

Hopkins Cog Sci is hiring! We have two open faculty positions: one in vision, and one language. Please repost!

4 months ago 32 34 0 2

Amazing news, Alex! Huge congrats, and very well deserved!

4 months ago 1 0 0 0
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Bridging Fields in Psychology and Neuroscience with Multidisciplinary Collaboration Strengthening collaboration to encourage novel research connections between scientific areas is central to the CIMCYC - María de Maeztu Unit of Excellence strategy . To encourage this, the CIMCYC has ...

@cimcyc.bsky.social is hiring!

SIX postdoc positions are coming up to dive into collaborative projects bridging together psychological science.

Amazing opportunity to boost a postdoc career in a cutting-edge research center with outstanding human teams!
👇🏽
cimcyc.ugr.es/en/informati...

4 months ago 13 11 0 0

Very thoughtful thread on why it matters to compute the right noise ceiling & why communication is so important to prevent this issue from spreading. Kudos to Sam for being so transparent!

In brief:
NC for best R^2 == data reliability expressed as r
NC for best r == sqrt(reliability)

4 months ago 5 1 0 0

We recently stumbled upon a surprisingly common misunderstanding in computing noise ceilings that can be quite consequential. So if you care about noise ceilings, please check out Sander’s thread and our preprint! 👇

4 months ago 18 5 0 0
OSF

New preprint w/ Malin Styrnal & @martinhebart.bsky.social

Have you ever computed noise ceilings to understand how well a model performs? We wrote a clarifying note on a subtle and common misapplication that can make models appear quite a lot better than they are.

osf.io/preprints/ps...

4 months ago 60 23 1 4
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Super happy to announce that our Research Training Group "PIMON" is funded by the @dfg.de ! Starting in October, we will have exciting opportunities for PhD students that want to explore object and material perception & interaction in Gießen @jlugiessen.bsky.social ! Just look at this amazing team!

4 months ago 31 5 1 1
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Top-down and bottom-up neuroscience as collections of practices - Nature Reviews Neuroscience Nature Reviews Neuroscience - Top-down and bottom-up neuroscience as collections of practices

New Correspondence with @davidpoeppel.bsky.social in Nat Rev Neurosci. www.nature.com/articles/s41...

Here, we critique a recent paper by Rosas et al. We argue that "Bottom-up" and "Top-down" neuroscience have various meanings in the literature.

PDF: rdcu.be/eSKYI

4 months ago 41 15 1 1
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Investigating individual-specific topographic organization has traditionally been a resource-intensive and time-consuming process. But what if we could map visual cortex organization in thousands of brains? Here we offer the community with a toolbox that can do just that! tinyurl.com/deepretinotopy

4 months ago 82 40 4 1

(3) The community can now start to apply Fernanda's tool retrospectively to countless existing anatomical scans to investigate how individual differences in retinotopic organization relate to measures of individual differences in function.

Really curious to hear how the community receives this!

4 months ago 4 0 0 0