Psychophysics

Ultra-Fast Image Categorization in biology and in neural models
Humans are able to robustly categorize images and can, for instance, detect the presence of an animal in a briefly flashed image in as …
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Ultra-Fast Image Categorization in biology and in neural models
2023-01-23_game-theory-and-the-brain
Game theory and brain strategies [2023-01-23] Atelier jeu et cerveau https://laurentperrinet.github.io/talk/2023-01-23-game-theory-and-the-brain Only the speaker can read these notes Press S key to view Photo by Naser Tamimi on Unsplash https://unsplash.com/fr/photos/yG9pCqSOrAg Game theory and brain strategies Le jeu du cerveau et du hasard, The Conversation
2023-01-23
2022-11-21_flash-lag-effect
[2022-11-21] Alex Reynaud’s lab meeting https://laurentperrinet.github.io/slides/2022-11-21_flash-lag-effect Only the speaker can read these notes Press S key to view Timing in the visual pathways Ultra-rapid visual processing (see review). Compensating visual delays (Perrinet, Adams & Friston 2014).
2022-11-21
Ultra-fast categorization of images containing animals in vivo and in computo
see a follow-up in: Jean-Nicolas Jérémie, Laurent U Perrinet (2023). Ultra-Fast Image Categorization in biology and in neural models. Vision. Cite DOI arXiv see an extension to visual search in: Jean-Nicolas Jérémie, Emmanuel Daucé, Laurent U Perrinet (2022).
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Ultra-fast categorization of images containing animals in vivo and in computo
From the retina to action: Dynamics of predictive processing in the visual system
Within the central nervous system, visual areas are essential in transforming the raw luminous signal into a representation which …
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From the retina to action: Dynamics of predictive processing in the visual system
Bayesian Modeling of Motion Perception using Dynamical Stochastic Textures
A common practice to account for psychophysical biases in vision is to frame them as consequences of a dynamic process relying on …
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Bayesian Modeling of Motion Perception using Dynamical Stochastic Textures
Selectivity to oriented patterns of different precisions
The selectivity of the visual system to oriented patterns is very well documented in a wide range of species, especially in mammals. In …
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Selectivity to oriented patterns of different precisions
The flash-lag effect as a motion-based predictive shift
Due to its inherent neural delays, the visual system has an outdated access to sensory information about the current position of moving …
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The flash-lag effect as a motion-based predictive shift
Open Science
To enable the dissemination of the knowledge that is produced in our lab, we share all source code with open source licences.
Open Science
A Mathematical Account of Dynamic Texture Synthesis for Probing Visual Perception
See a followup in Jonathan Vacher, Andrew Isaac Meso, Laurent U Perrinet, Gabriel Peyré (2018). Bayesian Modeling of Motion Perception using Dynamical Stochastic Textures. Neural Computation. PDF Cite DOI URL arXiv
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The characteristics of microsaccadic eye movements varied with the change of strategy in a match-to-sample task
Under natural viewing conditions, large eye movements are interspace by small eye movements (microsaccade). Recent works have shown …
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Dynamic Textures For Probing Motion Perception
This work extends the MotionClouds dynamic texture model testing aspects of its parametrization with an application in psychophysics.
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Measuring speed of moving textures: Different pooling of motion information for human ocular following and perception
The visual system does not process information instantaneously, but rather integrates over time. Integration occurs both for stationary …
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Pattern discrimination for moving random textures: Richer stimuli are more difficult to recognize
In order to analyze the characteristics of a rich dynamic visual environment, the visual system must integrate information collected at …
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Pattern discrimination for moving random textures: Richer stimuli are more difficult to recognize
Effect of image statistics on fixational eye movements
Under natural viewing conditions, small movements of the eyes prevent the maintenance of a steady direction of gaze. It is unclear how …
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Measuring speed of moving textures: Different pooling of motion information for human ocular following and perception.
To measure speed and direction of moving objects, the cortical motion system pools information across different spatiotemporal …
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More is not always better: dissociation between perception and action explained by adaptive gain control
Moving objects generate motion information at different scales, which are processed in the visual system with a bank of spatiotemporal …
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More is not always better: dissociation between perception and action explained by adaptive gain control
Perceptions as Hypotheses: Saccades as Experiments
If perception corresponds to hypothesis testing (Gregory, 1980); then visual searches might be construed as experiments that generate …
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Perceptions as Hypotheses: Saccades as Experiments
Pattern discrimination for moving random textures: Richer stimuli are more difficult to recognize
In order to analyze the characteristics of a rich dynamic visual environment, the visual system must integrate information collected at …
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Different pooling of motion information for perceptual speed discrimination and behavioral speed estimation
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