A5027014654- Visual perception and processing mechanisms
- Neural and Behavioral Psychology Studies
- Reading and Literacy Development
- Neural dynamics and brain function
- Gaze Tracking and Assistive Technology
- Cognitive and developmental aspects of mathematical skills
- Tactile and Sensory Interactions
- Visual Attention and Saliency Detection
- Face Recognition and Perception
- Visual and Cognitive Learning Processes
- Ocular and Laser Science Research
- EEG and Brain-Computer Interfaces
- Child Development and Digital Technology
- Surface Roughness and Optical Measurements
- Color perception and design
- Retinal Development and Disorders
- Olfactory and Sensory Function Studies
Aix-Marseille Université
2013-2022
Centre National de la Recherche Scientifique
2012-2022
Université Paris Cité
2016-2019
Laboratoire Psychologie de la Perception
2016-2019
Laboratoire de Physique des Plasmas
2018
Laboratoire de Psychologie Cognitive
2010-2016
The double-drift stimulus (a drifting Gabor with orthogonal internal motion) generates a large discrepancy between its physical and perceived path. Surprisingly, saccades directed to the land along physical, not perceived, path (Lisi M, Cavanagh P. Curr Biol 25: 2535−2540, 2015). We asked whether memory-guided exhibited same dissociation from perception. Participants were keep their gaze centered on fixation dot while moved back forth linear in periphery. offset of was go signal make saccade...
The present study investigated the impact of inter-character spacing on saccade programming in beginning readers and dyslexic children. In two experiments, eye movements were recorded while children, reading-age, chronological-age controls, performed an oculomotor lateralized bisection task words strings hashes presented either with default or extra between characters. results Experiment 1 showed that (1) only proficient had already developed highly automatized procedures for both left-...
How neuronal activity is integrated over time may largely rely on excitatory and inhibitory mechanisms. Dynamic neural field models assume that local excitation lateral inhibition (i.e., the “Mexican hat”) shape output of networks. Most saccade generation such interactions in superior colliculus play a key role determining both metrics latency saccades. Here, we investigated humans. We used target task which visual distractor line was presented close to peripheral small circle). Models...
The double-drift stimulus leads to a large discrepancy between the physical path of moving Gabor and its perceived direction. Surprisingly, saccades do not show any effect illusion (Lisi & Cavanagh, 2015). Here, we asked whether efference copy saccade was influenced by illusion. This question addressed using saccadic suppression displacement. We presented single along linear trajectory with internal motion (double-drift condition) or without (control condition). In condition, orientation...
The representation of visual space is distorted in several areas the brain, including Superior Colliculus (SC) where population averaging presumably determines amplitude saccadic eye movements. We previously showed, based on human behavioral data that this responsible for rather systematic tendency to undershoot center eccentric, simple-shape stimuli (Vitu & Casteau, VSS 2013). Here, we reveal map SC a general principle accounts metrics saccades towards varying sizes and shapes, irrespective...
Visual features such as luminance and orientation are known to influence oculomotor behavior. However, suggested in models of saccade generation, they may intervene with different time courses, through respectively direct (retinal) vs. indirect (retino-cortical -V1) projections the Superior Colliculus. To test this hypothesis, we compared required initiate a toward peripheral visual target that was defined either by its average or relative textured background. In first experiment, used...
The double-drift stimulus leads to a large discrepancy between the physical path of moving gabor and its perceived direction. Saccades directed land along physical, not perceived, (Lisi & Cavanagh, 2015). Here we asked whether memory-guided saccades exhibited same dissociation from perception. We used stimuli as in Lisi Cavanagh (2015): single back forth linear trajectory while internal motion drifted orthogonal During presentation, participants were keep their eyes focused on fixation dot,...
It is well known that the metrical properties of saccadic eye movements are strongly influenced by extraction low-level visual features (e.g. luminance). Higher-level, visual-cortical orientation) may also contribute, but it remains undetermined whether they intervene automatically, irrespective their relevance for task. Here, we investigated this issue in a saccade-target paradigm. We manipulated uncertainty target location order to either force orientation (maximal uncertainty) or make...