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Pascal Mamassian

@mamassian.bsky.social
1.6K followers 255 following 133 posts

I’m studying visual perception, mostly using psychophysics. I work for the CNRS at the Ecole Normale Supérieure in Paris.

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Reposted by Pascal Mamassian
Perception / i-Perception @pec-ipe.bsky.social · 23/09/2026
🔗 Can we really ignore the visual binding problem? Examples of visual illusions show that features such as colour and motion can be incorrectly combined, providing evidence that visual binding remains an important problem for understanding perception👁️ Read more: doi.org/10.1177/0301...
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Pascal Mamassian @mamassian.bsky.social · 17/09/2026
Congratulations to Dr Tarryn Balsdon for beautifully defending her “Habilitation à Diriger des Recherches”, i.e. autorisation to officially supervise her own PhD students!!!
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Pascal Mamassian @mamassian.bsky.social · 08/09/2026
Thanks Derek for your commentary on the debate of the visual binding problem! And thanks for the nice demos!
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Reposted by Pascal Mamassian
Jonathan Vacher @jon-v.bsky.social · 03/09/2026
Wanna generate rich and controlled textures to study vision ? Dyntex is now available on PyPI ! Read the doc : dynamic-textures.gitlab.io/dyntex-pytho... jov.arvojournals.org/article.aspx...
dynamic-textures.gitlab.io
Dynamic Texture Package (dyntex) — DynTex 1.1 documentation
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Pascal Mamassian @mamassian.bsky.social · 21/08/2026
For those interested in this postdoctoral position: If you attend ECVP next week and would like to meet quickly, don't hesitate to drop me an email.
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Reposted by Pascal Mamassian
ECVP 2026 @ecvp.bsky.social · 18/08/2026
📱 The ECVP 2026 Scheduler App is here! 🎉 Explore all 622 keynotes, symposia, talks, posters & socials. Search, filter, build your schedule and export to your calendar — no app or sign-up needed! 👉 markwgreenlee.github.io/ecvp-2026-sc... Thanks to Mark Greenlee for developing this! 🙌 #ECVP2026
markwgreenlee.github.io
ECVP 2026 Scheduler
Search and organize your ECVP 2026 (Bournemouth, August 23–27) conference schedule with full-text search, day/type filters, and calendar export.
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Perception / i-Perception @pec-ipe.bsky.social · 10/08/2026
🎤 Perception Lecture at ECVP 2026 We are delighted to announce the Perception Lecture, sponsored by SAGE journals Perception and i-Perception. Join Karl Gegenfurtner for: 🌈 “Colour Vision — Then and Now” 📅 Sunday 23 August 📍 Bournemouth International Centre #ECVP2026 #ColorVision
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Pascal Mamassian @mamassian.bsky.social · 07/08/2026
groovy!
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Pascal Mamassian @mamassian.bsky.social · 11/07/2026
Deeply honoured and very humbled to have received the 2026 Kurt Koffka Medal. Many thanks to the committee at the University of Giessen! www.uni-giessen.de/fbz/fb06/psy...
Pascal Mamassian (centre) receiving the 2026 Kurt Koffka Medal from Prof. Dr. Christiane Hermann (left) and Prof. Dr. Roland W. Fleming at the University of Giessen, Germany, on July 8, 2026.
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Pascal Mamassian @mamassian.bsky.social · 09/07/2026
How meaningful is it to search for the minimal exposure duration of a stimulus to understand visual perception? With Mark Wexler, we wrote a commentary on the article of Lanfranco et al., Nat. Commun., 2024: www.nature.com/articles/s41...
nature.com
The meaningfulness of searching for minimal exposure duration to understand visual perception - Nature Communications
Nature Communications - The meaningfulness of searching for minimal exposure duration to understand visual perception
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Reposted by Pascal Mamassian
Nadia Hosseinizaveh @nadiahosseinizaveh.bsky.social · 07/07/2026
(1/6) My first first-author paper is now out in @nconsc.bsky.social! Part of my PhD work with @mamassian.bsky.social at @lsp-ens.bsky.social. We looked at how confidence behaves during a perceptual learning task with no feedback. academic.oup.com/nc/article/2...
academic.oup.com
Perceptual learning without feedback is accompanied with systematic changes in confidence processing
Abstract. Perceptual learning can occur without external feedback, raising questions about what internal signals might guide this learning. Here, we test t
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Pascal Mamassian @mamassian.bsky.social · 01/07/2026
However, these two points correspond to two different times. The slowness of consciousness puts the organisms in the past, whereas predictions give them a preview of the future. Given this tension between past and future representations, when is “now”? My commentary: hal.science/hal-05670806 2/2
hal.science
Making sure you're not a bot!
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Pascal Mamassian @mamassian.bsky.social · 01/07/2026
In their recent BBS article (doi.org/10.1017/S014...), Steve Fleming (@smfleming.bsky.social) and Matthias Michel (@matthiasmichel.bsky.social) discuss the slowness of conscious vision and the predictions generated by an internal model of the world. 1/2
doi.org
Sensory horizons and the functions of conscious vision | Behavioral and Brain Sciences | Cambridge Core
Sensory horizons and the functions of conscious vision - Volume 49
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Steve Fleming @smfleming.bsky.social · 25/06/2026
Lovely to see the full range of excellent commentaries on our BBS article with @matthiasmichel.bsky.social, together with our response, now out: Target article: www.cambridge.org/core/journal... Commentaries: www.cambridge.org/core/journal... Our response: www.cambridge.org/core/journal...
cambridge.org
Sensory horizons and the functions of conscious vision | Behavioral and Brain Sciences | Cambridge Core
Sensory horizons and the functions of conscious vision - Volume 49
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Pascal Mamassian @mamassian.bsky.social · 17/06/2026
For informal inquiries, and to submit your application, send emails to: pascal.mamassian@ens.fr david.pascucci@chuv.ch We look forward to hearing from you! (8/8)
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Pascal Mamassian @mamassian.bsky.social · 17/06/2026
Applications should include: 1. Most recent CV 2. Documents confirming a PhD degree 3. Statement of intent, describing why you are a good fit for the position 4. Two letters of recommendation (or email addresses) from qualified academics familiar with your work (7/8)
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Pascal Mamassian @mamassian.bsky.social · 17/06/2026
We seek dedicated, enthusiastic candidates with strong motivation to contribute to interdisciplinary research. We welcome applications from candidates of all backgrounds and genders. (6/8)
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Pascal Mamassian @mamassian.bsky.social · 17/06/2026
Preferred skills: - Psychophysics software (e.g., Psychtoolbox, PsychoPy) - Programming (e.g., MATLAB, Python, C/C++) - Computational modeling (e.g. Bayesian models, Kalman filters) - Statistical analysis (e.g., in R) - Dedication to data collection in task batteries (5/8)
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Pascal Mamassian @mamassian.bsky.social · 17/06/2026
Applicants should hold a PhD in Psychology, Neuroscience, Biology, Engineering, Computer Science, Mathematics, or a related field. Experience in visual psychophysics is strongly valued. (4/8)
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Pascal Mamassian @mamassian.bsky.social · 17/06/2026
Why do individuals differ in how temporal context shapes their perceptual judgments? We will address this question through visual psychophysics and computational modeling methods, focusing on the interaction between endogenous perceptual traits and external factors. (3/8)
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Pascal Mamassian @mamassian.bsky.social · 17/06/2026
The "Laboratoire des Systèmes Perceptifs" (Pascal Mamassian, @mamassian.bsky.social) and the "Psychophysics and Neural Dynamics Lab" (David Pascucci, @davidpascucci.bsky.social) invite applications for a post-doctoral position (2 years) supported by the ANR-SNSF "FLUCTUAT" project. (2/8)
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Pascal Mamassian @mamassian.bsky.social · 17/06/2026
Open post-doc position in the study of perceptual fluctuations Position: post-doctoral (2 years) Locations: Paris, France (Ecole Normale Supérieure / CNRS) and Lausanne, Switzerland (University of Lausanne / CHUV) Deadline: September 4th, 2026 Start Date: Fall 2026 (with some flexibility) (1/8)
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Perception / i-Perception @pec-ipe.bsky.social · 05/06/2026
With profound sadness we announce the sudden and unexpected death of our Editor-in-Chief, Tim Meese. A founding editor of i-Perception, Tim was a pillar of the vision science community and instrumental in shaping the landscape of scientific publishing in our field.
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Pascal Mamassian @mamassian.bsky.social · 01/06/2026
Very nice demo! Contrast reversals of the squares and their edges at different times make a huge difference.
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Pascal Mamassian @mamassian.bsky.social · 20/05/2026
sorry, still not convinced. apart from the confidentiality and the biases issues, I think current AI cannot distinguish groundbreaking ideas from complete nonsense. I still think that using AI for peer reviewing is like using a microwave to reheat an old meal: doi.org/10.1177/0301...
doi.org
Sage Journals: Discover world-class research
Subscription and open access journals from Sage, the world's leading independent academic publisher.
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Reposted by Pascal Mamassian
Mark Greenlee @greenlee-markw.bsky.social · 12/05/2026
Going to VSS this year? I built a free mobile app to organize your schedule. Tap any entry to read the full abstract. Add sessions to a personal schedule and export to Google or Apple Calendar. Works on iPhone and Android via Expo Go app. Just scan the QR code in README: github.com/markwgreenle...
github.com
GitHub - markwgreenlee/vss-2026-scheduler: VSS 2026 scheduler works together with Expo Go (download for free on Apple App Store or Google Play).
VSS 2026 scheduler works together with Expo Go (download for free on Apple App Store or Google Play). - markwgreenlee/vss-2026-scheduler
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Pascal Mamassian @mamassian.bsky.social · 19/04/2026
A classic painting from the Mexican artist Octavio Ocampo. Try rotating the image upside-down if you don't see anything strange at first.
Octavio Ocampo (1992) “Equality”. 
The mirror reflection of the woman's face is perceived as a man's face.
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Pascal Mamassian @mamassian.bsky.social · 18/04/2026
Anyone seriously interested in synesthesia should watch this 1994 BBC programme, not just to see a younger Roger Watt! archive.org/details/bbch... And to confirm the end of the video, Kandinsky was indeed a synesthete: philharmoniedeparis.fr/fr/activite/...
archive.org
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Reposted by Pascal Mamassian
Trends in Cognitive Sciences @cp-trendscognsci.bsky.social · 11/04/2026
Online Now: Perceptual multistability: a multifaceted window into brain dysfunctions
dlvr.it
Perceptual multistability: a multifaceted window into brain dysfunctions
Perceptual multistability, observed across species and sensory modalities, offers valuable insights into numerous cognitive functions and dysfunctions. For instance, differences in temporal dynamics and information integration during percept formation often distinguish clinical from nonclinical populations. Computational psychiatry can elucidate these variations through two primary approaches: (i) Bayesian modeling, which treats perception as an unconscious inference, and (ii) an active, information-seeking perspective (e.g., reinforcement learning), which frames perceptual switches as internal actions. Our synthesis aims to leverage multistability to bridge these computational psychiatry subfields, linking human and animal studies as well as connecting behavior to underlying neural mechanisms. Perceptual multistability emerges as a promising noninvasive tool for clinical applications, facilitating translational research and enhancing our mechanistic understanding of cognitive processes and their impairments.
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Pascal Mamassian @mamassian.bsky.social · 03/04/2026
In this image, the square tiles look like diamond shapes when light grazes the surface. (The square tiles are actually floor heating elements) Probably related to the coffer illusion by Anthony Norcia.
Floor heating elements that have a square shape look like diamond tiles when light grazes the surface.
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Pascal Mamassian @mamassian.bsky.social · 27/03/2026
Congratulations Karl! @pec-ipe.bsky.social
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Pascal Mamassian @mamassian.bsky.social · 16/03/2026
Congratulations to Ian Thornton and colleagues who published their Mainz-Linez illusion in i-Perception (@pec-ipe.bsky.social): the red dots appears to wave left and right when one looks at one of the black dots, but they actually move straight journals.sagepub.com/doi/10.1177/...
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Pascal Mamassian @mamassian.bsky.social · 12/03/2026
A new Department of Cognitive Science is being created at Bocconi University in Milan, Italy. Here is the call for a cluster hire (for around 10 faculty) in all areas of cognitive science, at both junior and senior levels: www.unibocconi.it/en/faculty-a... Deadline: May 4th, 2026
unibocconi.it
Open Rank Faculty Cluster Hire Search for the New Department of Cognitive Science at Bocconi - Bocconi University
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Pascal Mamassian @mamassian.bsky.social · 01/03/2026
Congratulations should be directed to Hinnerk Schulz-Hildebrandt who chose "Perception" to publish this effect (disclaimer: I'm Editor-in-Chief of this journal!). As to whether it is an "illusion", I think it does fit the definition of Dejan Todorovic doi.org/10.1177/0301...
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Pascal Mamassian @mamassian.bsky.social · 28/02/2026
Now published in Perception (@pec-ipe.bsky.social)! Schulz-Hildebrandt, H. (2026). When purple perceived only at fixation: A fixation- and distance-dependent color illusion. Perception, 0(0). doi.org/10.1177/0301...
doi.org
When purple perceived only at fixation: A fixation- and distance-dependent color illusion - Hinnerk Schulz-Hildebrandt, 2026
In this paper, an optical illusion is described in which purple elements are perceived as purple at the point of fixation, while surrounding elements of the sam...
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Pascal Mamassian @mamassian.bsky.social · 20/02/2026
The European Summer School "Visual Neuroscience" in Rauischholzhausen castle, Germany, is coming back in 2026! Deadline: 8 March 2026 www.allpsych.uni-giessen.de/rauisch/
Flyer for 2026 edition of the European Summer School "Visual Neuroscience" in Rauischholzhausen castle, Germany.
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Reposted by Pascal Mamassian
Kate Storrs @katestorrs.bsky.social · 09/02/2026
Our latest paper, “Visual language models show widespread visual deficits on neuropsychological tests”, is now out in Nature Machine Intelligence: www.nature.com/articles/s42... Non-paywalled version: arxiv.org/abs/2504.10786 Tweet thread below from first author @genetang.bsky.social...
nature.com
Visual language models show widespread visual deficits on neuropsychological tests - Nature Machine Intelligence
Tangtartharakul and Storrs use standardized neuropsychological tests to compare human visual abilities with those of visual language models (VLMs). They report that while VLMs excel in high-level obje...
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Pascal Mamassian @mamassian.bsky.social · 06/02/2026
The CNRS (@cnrs.fr) and the Ecole Normale Supérieure/PSL University (@normalesup.bsky.social) is launching a 5-year International Research Project (IRP) with University College London (@ucl.ac.uk) on human perception and consciousness. www.ucl.ac.uk/global/news/...
ucl.ac.uk
UCL launches landmark European collaboration on perception science
UCL is working with top French partners CNRS and ENS – PSL on a major European research initiative to advance understanding of human perception and consciousness.
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Steve Fleming @smfleming.bsky.social · 20/01/2026
We're running a 5th edition of the always-exciting UCL Summer School on Consciousness and Metacognition this year, 8th-10th July 2026 in London. Accommodation and travel expenses are covered. For more information and how to apply, check out metacoglab.org/summer-schoo...
metacoglab.org
Summer School - About — the MetaLab
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Reposted by Pascal Mamassian
Jean-Baptiste André @jbaptistandre.bsky.social · 19/01/2026
1/ 📢 Come study cognitive science in Paris! The Master’s program in Cognitive Science at @ENS_ULM, @psl_univ, and @EHESS_fr is now accepting applications for the next academic year. 🗓 Deadline: February 24, 2026 💻 Apply here: master-cognitive-science.ens.psl.eu/en/applicati...
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Pascal Mamassian @mamassian.bsky.social · 05/01/2026
This renewed opportunity to transform our understanding of perceptual organization will require closer integration between segmentation experiments and algorithms. The examples discussed in this paper demonstrate encouraging initial steps towards this goal.
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Pascal Mamassian @mamassian.bsky.social · 05/01/2026
Ironically, this has happened at a time in which artificial networks have revolutionized automatic segmentation. Here we direct the spotlight on the convergence between new algorithms and experimental approaches to study segmentation of natural images.
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Pascal Mamassian @mamassian.bsky.social · 05/01/2026
Perceptual segmentation is central to how visual systems achieve their functional goals, yet research on human segmentation has fallen somewhat out of fashion in the last decade.
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Pascal Mamassian @mamassian.bsky.social · 05/01/2026
Are we ready to tackle perceptual segmentation of natural scenes? Finally the review on perceptual segmentation you’ve been waiting for! www.sciencedirect.com/science/arti...
An illustration of how human perceptual segmentation and integration (PSI) of natural stimuli and image segmentation algorithms can be bridged.
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Marika Constant @marikaconstant.bsky.social · 05/01/2026
🎉 Excited to share this! Low-level, naturally formed priors influence our perceptual inferences, but do they impact our confidence in the same way? With @elifilevich.bsky.social and @mamassian.bsky.social we found: they influence confidence even more strongly! More👇 1/5 dx.plos.org/10.1371/jour...
dx.plos.org
Long-term perceptual priors drive confidence bias that favors prior-congruent evidence
Author summary Prior expectations play a critical role in shaping not only the perceptual inferences that we make, but also how confident we feel about those inferences. Bayesian confidence models cap...
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Pascal Mamassian @mamassian.bsky.social · 20/12/2025
This head is spinning continuously, but we see it rotating back and forth... ...presumably because of our strong prior expectation that faces are convex. This is a very nice example of the Hollow-Face illusion promoted by Richard Gregory: www.richardgregory.org/experiments/
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Arte-mise @arte-mise.bsky.social · 20/12/2025
Exposition Bridget Riley et Seurat au musée d’Orsay jusqu’au 26 janvier, l’artiste presque centenaire, gloire de l’art cinétique, eu la révélation des interactions des couleurs en copiant Seurat en 1959. L’occasion rare de faire l’expérience sensible des liens reliant ces 2 géants de la perception
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Pascal Mamassian @mamassian.bsky.social · 15/12/2025
Congratulations Sara and Guido! The two of you look beautiful!
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Ian Phillips @ianbphillips.bsky.social · 12/12/2025
Great new initiative from the editors of Perception: Philosophy Corner. A forum for "accessible reflections on the conceptual foundations of sensory/perception science where empirical insight meets philosophical inquiry". journals.sagepub.com/doi/full/10....
journals.sagepub.com
Introducing Philosophy Corner - Tim S. Meese, Pascal Mamassian, Isabelle Mareschal, Frans A.J. Verstraten, 2025
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Arte-mise @arte-mise.bsky.social · 09/12/2025
L’ancêtre du camouflage, crée pour la 1ere guerre mondiale, pour des navires de guerre. Les rayures empêchent de déterminer la vitesse, entraine la confusion et rend imprécis les tirs…
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