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Reposted by Pascal Mamassian

Dawei Bai @daweibai.bsky.social · 5d

How about in this case?
Surprisingly, most people *predominantly see 180° motion*, while 360° motion is hardly, if ever, perceived – even though the rings move in the same way as above!
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Reposted by Pascal Mamassian

Martin Wiener @martinwiener.bsky.social · 6d

"This integration supports the conclusion that time may be the fundamental dimension along which the brain organizes its sensorium..."

Fantastic review by Pawan Sinha and colleagues (@lukasvogelsang.bsky.social @marinv.bsky.social)

doi.org/10.1146/annu...

The Temporal Scaffolding of Sensory Organization

How a developing nervous system discovers meaning in complex sensory inputs has typically been examined separately for each sensory modality. Even as studies have uncovered modality-specific strategie...

doi.org

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Pascal Mamassian @mamassian.bsky.social · 12d

Responses to combinations of motion clouds were well explained by a simple summation mechanism of the individual components.

Finally, a subset of neurons exhibited responses that could distinguish different speeds.

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Pascal Mamassian @mamassian.bsky.social · 12d

We found that motion features were encoded in a temporally ordered sequence: orientation and spatial frequency emerged within 120 ms after stimulus onset, while temporal frequency and direction followed at later latencies.

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Graphical abstract of the main results of the study by Thomas Schaffhauser

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Pascal Mamassian @mamassian.bsky.social · 12d

Delighted to share this work led by Thomas Schaffhauser on the processing of rich natural-like motion stimuli (“motion clouds”) in the visual cortex of the ferret:

www.biorxiv.org/content/10.1...

This work was done with Yves Boubenec at the @lsp-ens.bsky.social.

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Encoding and combining naturalistic motion cues in the ferret higher visual cortex

Natural visual scenes contain rich flows of pattern motion that vary not only in orientation but also in spatial sizes and temporal rhythms. To properly interpret the motion, the brain must extract in...

www.biorxiv.org

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Pascal Mamassian @mamassian.bsky.social · 14d

A nice shift in perceived colour between central and peripheral vision. The fixated disc looks purple while the others look blue.

The effect presumably comes from the absence of S-cones in the fovea.

From Hinnerk Schulz-Hildebrandt:
arxiv.org/pdf/2509.115...

An array of 9 purple discs on a blue background. Figure from Hinnerk Schulz-Hildebrandt.

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Reposted by Pascal Mamassian

enes altun @altunenes.bsky.social · 14d

Brightness induced by motion
Instruction: Without blinking, follow the green ball :)

live version with shader code:
www.shadertoy.com/view/tc2fDD

#illusion #perception

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Pascal Mamassian @mamassian.bsky.social · 26d

A beautiful painting from Georges de la Tour where the coat’s grey paint appears blue because of the dominant yellow colour in the canvas.

It took another two centuries for Eugène Chevreul to describe the laws of simultaneous contrast, used later by Vincent van Gogh, Sonia Delaunay, and others.

Arte-mise @arte-mise.bsky.social · 26d

The new Georges de la Tour exhibition at the Jacquemart-André Museum has begun! A virtuoso technique used to meditate on the human condition.This coat of Saint Thomas contains no blue, only grey coulours; it is an optical illusion created by the adjacent yellow.

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Reposted by Pascal Mamassian

David_Pascucci @davidpascucci.bsky.social · 26d

My Research Highlight on an important study assessing large-scale evidence for perceptual entrainment to auditory rhythms is now out,
emphasizing the importance of replications, sample sizes and variability across individuals and labs @natureportfolio.nature.com

rdcu.be/eFODC

Neuroscience: large-scale evidence for perceptual entrainment to auditory rhythms

Communications Psychology - A large multi-lab replication study confirms that rhythmic sounds can entrain perceptual performance, while revealing substantial inter-individual variability.

rdcu.be

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Reposted by Pascal Mamassian

CNRS @cnrs.fr · 27d

#PressRelease 🗞️ The 2025 CNRS Gold Medal has been awarded to Stéphane Mallat, recognised the world over for his research on mathematics applied to signal processing and artificial intelligence.

👉 cnrs.fr/en/press/bet...

#CNRStalents 🏅

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Reposted by Pascal Mamassian

Akiyoshi Kitaoka @akiyoshikitaoka.bsky.social · Sep 8

The diamond appears to move.

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Reposted by Pascal Mamassian

pieterroelfsema.bsky.social @pieterroelfsema.bsky.social · Sep 7

In this short letter we explain why binding problems occur in the brain and why deep neural networks need to cope with them. We respond to Scholte and de Haan (TICS 2025), who claimed the opposite.

lnkd.in/euNaS6eu

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Pascal Mamassian @mamassian.bsky.social · Sep 4

Indeed, Zebra noise shares some characteristics of the Motion Clouds, but for the purpose of strongly driving visual neurons, they decided to binarize their stimulus, whereas we preserve the full luminance range.

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Pascal Mamassian @mamassian.bsky.social · Sep 4

Thanks Andrey!

Motion Clouds are one step closer to natural movies, while still allowing the experimenter to have full control on its generation.

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Pascal Mamassian @mamassian.bsky.social · Sep 4

Forget random-dot motion and drifting gratings, embrace "Motion Clouds", the motion stimulus of the 21st century!

by:
Andrew Meso
Jonathan Vacher, @jon-v.bsky.social
Nikos Gekas
Pascal Mamassian, @mamassian.bsky.social
Laurent Perrinet, @laurentperrinet.bsky.social
Guillaume Masson

Laurent Perrinet @laurentperrinet.bsky.social · Sep 4

🚀 Excited to share our new paper:

> "DynTex: A real-time generative model of dynamic naturalistic luminance textures"

...now published in Journal of Vision!

Read it here: doi.org/10.1167/jov....

#DynamicTextures #ComputationalNeuroscience #ComputerVision #OpenScience

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Pascal Mamassian @mamassian.bsky.social · Sep 4

Congratulations, very impressive collaborative work!

The published results are already interesting, but the open-source data will undoubtedly be very useful in the future.

Matteo Carandini @carandinilab.net · Sep 3

The two key studies of the International Brain Laboratory @intlbrainlab.bsky.social are out today!

A brain-wide map of neural activity during complex behaviour
www.nature.com/articles/s41...

Brain-wide representations of prior information in mouse decision-making
www.nature.com/articles/s41...

A brain-wide map of neural activity during complex behaviour - Nature

The International Brain Laboratory presents a brain-wide electrophysiological map obtained from pooling data from 12 laboratories that performed the same standardized perceptual decision-making task i...

www.nature.com

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Pascal Mamassian @mamassian.bsky.social · Aug 29

2026 - Bournemouth, UK
2027 - Padua, Italy
2028 - Paris, France

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Reposted by Pascal Mamassian

Thérèse Collins @theresecollins.bsky.social · Aug 29

As #ECVP2025 wraps up, I’m delighted that #ECVP2028 in Paris was accepted at the Business Meeting! ECVP will meet again before but the Parisian organizing committee is already planning an unforgettable 50th anniversary!

A Mucha-style painting showing the Eiffel Tower at sunset with ECVP 50 2028 Paris written

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Pascal Mamassian @mamassian.bsky.social · Aug 29

Thanks @marco-be.bsky.social‬ for sharing the video of the festschrift you organized at ECVP 2018 in Trieste.

I remember the pleasure I had listening to Michael recollecting stories of his career, and the pleasure he had telling us his stories.

www.youtube.com/watch?v=GFk2...

A festschrift for Michael Kubovy at ECVP 2018

YouTube video by andreweeg

www.youtube.com

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Reposted by Pascal Mamassian

Perception / i-Perception @pec-ipe.bsky.social · Aug 26

Already halfway through the fantastic @ecvp.bsky.social‬ conference in Mainz!

It started beautifully with the Perception Lecture given by Astrid Kappers.

Looking forward to reading the paper linked to the lecture that will be published in Perception!

Astrid Kappers being congratulated by Heiko Hecht at the end of her Perception Lecture at ECVP 2025

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Pascal Mamassian @mamassian.bsky.social · Aug 22

Very sad to hear that Michael Kubovy passed away on 21 August 2025.

It is a great loss to perceptual science. His book "The Psychology of Perspective and Renaissance Art" remains unparalleled.

en.wikipedia.org/wiki/Michael...

Michael Kubovy - Wikipedia

en.wikipedia.org

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Reposted by Pascal Mamassian

Editors of Neuroscience of Consciousness @nconsc.bsky.social · Aug 17

🚨 New article in #NCONSC

Confidence in auditory perceptual completion
academic.oup.com/nc/article/2...

From Cemre Baykan, Pascal Mamassian & Alexander C Schütz

#consciousness
🧠🧪

Confidence in auditory perceptual completion

Abstract. Previous studies examining confidence in perceptual completion in vision showed that observers can be unaware of missing sensory information and

academic.oup.com

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Pascal Mamassian @mamassian.bsky.social · Aug 15

I think common knowledge is good, this avoids repeating the mistakes of the past, and properly appreciate what is a significant step forward rather than, say, a flashy story.

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Pascal Mamassian @mamassian.bsky.social · Aug 15

I don't think there is a knowledge gap between editors and reviewers in specialized journals, but that gap might exist in some general journals, just because editors cannot be expert on the large range of topics covered in their journals.

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Pascal Mamassian @mamassian.bsky.social · Aug 15

I guess editors and reviewers in specialized journals share some common knowledge (why 2AFC is usually better than a yes-no paradigm) that is going to be diluted (forgotten? dismissed?) is other journals.

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