Pascal Mamassian

@mamassian.bsky.social

1590 Followers 251 Following

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

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.
Octavio Ocampo (1992) “Equality”. The mirror reflection of the woman's face is perceived as a man's face.
Floor heating elements that have a square shape look like diamond tiles when light grazes the surface.
Flyer for 2026 edition of the European Summer School "Visual Neuroscience" in Rauischholzhausen castle, Germany.
An illustration of how human perceptual segmentation and integration (PSI) of natural stimuli and image segmentation algorithms can be bridged.
A head that is spinning continuously, but seen to rotate back and forth.
Graphical abstract of the main results of the study by Thomas Schaffhauser
An array of 9 purple discs on a blue background. Figure from Hinnerk Schulz-Hildebrandt.
modelling of continuous confidence judgments
estimation of confidence boost parameter
effect of sensory criterion on confidence efficiency
relationship between sensory evidence and confidence evidence
Erroneous clock time readings from different LLMs
The Müller-Lyer illusion on the left, and a blurred copy on the right that might be responsible for the illusion.
the model “GPT-4o” is also biased but has the option to check its answer
the model “Claude” is also biased in the rotated version of the illusion
the model “Claude” is also biased when there is no illusion
the model "Claude" is biased by the vertical-horizontal illusion
A man seems to be floating over a road because of a stain on the road that is interpreted as his cast shadow.
delegates of the FAsT 2024 meeting