ePoster · Vision Science
Perceptual filling-in reflects response properties of early visual cortex
Anna Razafindrahaba, Kenshu Koiso, Vincent van de Ven, Peter de Weerd, Federico de Martino, Mark Roberts · FENS Forum 2024
Perceptual filling-in occurs when a blank patch in the periphery of a texture field perceptually disappears after sustained fixation. This process may be mediated by horizontal spreading of activity in the early visual cortex. To test this proposal, we assessed if the oblique effect and the surround suppression effect, known to modulate activity in early visual cortex, modulates filling-in. In a psychophysics and eye-tracking experiment, 63 participants reported filling-in while attending peripherally to a grey rectangle on a dynamic texture field. We varied the orientation of elements in the