Bienvenue sur le site de l'université Paris Descartes

avril 2012

  • 23 avrHumans do not possess a visual sense of approximate number

    23 avr 2012
    Conférences/Débats

    With Steven Dakin,  UCL Institute of Ophthalmology

    There is current interest in how we are able to make an estimate of the approximate number of objects in a scene: existing evidence suggests that we may have a dedicated "visual number" sense that may even be linked to mathematical ability. In this talk I will present evidence from my lab that, contrary to this position, human sense of number is not independent of our sense of space/distance and that our ability to estimate one depends on the other. This implicates a common perceptual metric, and we describe one candidate based on the relative output of high and low spatial frequency-tuned filters (emulating the operation of visual neurons in the geniculate and primary visual areas). This simple model can explain a range of perceptual phenomena associated with approximate number estimation.

     

    Site : Salle de réunion du LPP, H432, 4ème étage,
    Centre Biomédical des Saints Pères
    45 rue des Sts Pères, 75006 Paris