Team Action, Vision and Learning

Coord. : Yvonne Delevoye & Muriel Boucart

This team is involved in the study of visual perception, the relations between perception and action and behavioral changes induced by the modification of visual inputs. Applications are developed in the domains of virtual reality, interactive robotics and pathologies related to vision (AMD, glaucoma, Alzheimer disease). More specifically, examples of current projects are presented here after:

  • Psychophysical study of central and peripheral vision (Muriel Boucart, Quentin Lenoble, Bilge Sayim and Cedrick Bonnet)

This project is aimed at understanding the capabilities of peripheral vision at large eccentricities through presentation of images of scenes, faces and objects on a panoramic screen (5m diameter Fig.1) to normally sighted people and in patients suffering from a selective loss of central (age related macular degeneration, stargardt disease) or peripheral vision (glaucoma). We also study the interactions between vision and posture (Fig.2) in patients with motor deficits (Parkinson disease) and, using qualitative and quantitative measures, we investigate appearance and appearance changes in peripheral vision and crowding (Fig.3). Eye movements are recorded with head mounted eye trackers.

2017 04 12 16 28 04 ResumeAVA Microsoft WordFig.1
Fig.22017 04 12 16 29 43 RésumeAVA Microsoft Word fig 22017 04 12 16 30 24 RésumeAVA Microsoft Word fig 3
Fig.3         

  • Learning Dynamics (Jerome Alessandri, Jean-Claude Darcheville, Jeremie Jozefowiez, Laurent Madelain, Yannick Miossec, Vinca Riviere)

Our researches focus on probing basic principles of learning and behavior in applied and experimental settings. Specifically we study associative learning and operant conditioning, variability, rule-governed behavior, conditioned reinforcement, motivation, decision, choice, temporal control, discriminative control and attention. One line of research focuses on the acquisition of new responses in the young human with or without pervasive developmental disorders. Another line of research examines the effects of environmental regularities on behavioral patterns in adults.

We use a broad range of methods such as reaction time, eye-tracking, fNIRS or EEG.

  • Action and Perception (Y. Coello, Y. Delevoye, A. Bartolo, Y. Wamain, C. Roger, S. Kalénine)

Another main line of research in the AVA team concerns the mechanisms underlying the representation, planning, and control of voluntary actions including object-related actions, rhythmic actions, symbolic and social actions. Action-related mechanisms are studied during the execution of actions as well as during the perception of actions or objects. In particular, the role of action in perceptual and conceptual processing is investigated in various perceptual domains: perception and representation of space, perception and identification of objects, and perception and understanding of others’ actions.

Several important methodologies in neurosciences and experimental psychology are used: EEG, fNIRS, EMG, motion capture, virtual reality, eye-tracking, reaction times, questionnaires, clinical tests.