Author(s)
CĂ©cile Eymond
Published 2 Projects
Neuroscience Size Perception Consciousness Peripheral Vision Visual
Tal Seidel Malkinson
Published 5 Projects
Neuroscience Attention Visual Search Spatial Neglect Brain Connections
CĂ©cile Eymond
Published 2 Projects
Neuroscience Size Perception Consciousness Peripheral Vision Visual
Content
Video Abstract (AI generated) (01:44) Paper Preprint (osf,"") Scientific ReportsOur conscious visual perception relies on predictive signals, notably in the periphery where sensory uncertainty is high. We investigated how such signals could support perceptual stability of objects size across the visual field. When attended carefully, the same object appears slightly smaller in the periphery compared to the fovea. Could this perceptual difference be encoded as a strong prior to predict the peripheral perceived size relative to the fovea? Recent studies emphasized the role of foveal information in defining peripheral size percepts. However, they could not disentangle bottom-up from top-down mechanisms. Here, we revealed a pure top-down contribution to the perceptual size difference between periphery and fovea. First, we discovered a novel Ebbinghaus illusion effect, inducing a typical reduction of foveal perceived size, but a reversed increase effect in the periphery. The size percept was similar at both retinal locations and deviated from the classic perceptual difference. Then through an updating process of successive peripheral-foveal viewing, the unusual peripheral perceived size decreased. The classic perceptual eccentricity difference was restored and the peripheral illusion effect changed into a fovea-like reduction. Therefore, we report the existence of a prior that actively shapes peripheral size perception and stabilizes it relative to the fovea. ### Competing Interest Statement The authors have declared no competing interest.
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Tal Seidel Malkinson. (2021, Nov 4).Learning to see the Ebbinghaus illusion in the periphery reveals a top-down stabilization of size perception across the visual field[Video]. Scitok. https://scitok.com/project/p/a6ab696b
Eymond CĂ©cile. "Learning to see the Ebbinghaus illusion in the periphery reveals a top-down stabilization of size perception across the visual field" Scitok, uploaded by Seidel Malkinson Tal, 4 Nov, 2021, https://scitok.com/project/pa6ab696b
Tal Seidel Malkinson. "Learning to see the Ebbinghaus illusion in the periphery reveals a top-down stabilization of size perception across the visual field" Scitok. (Nov 4, 2021). https://scitok.com/project/p/a6ab696b
Tal Seidel Malkinson (Nov 4, 2021). Learning to see the Ebbinghaus illusion in the periphery reveals a top-down stabilization of size perception across the visual field Scitok. https://scitok.com/project/p/a6ab696b
Tal Seidel Malkinson. Learning to see the Ebbinghaus illusion in the periphery reveals a top-down stabilization of size perception across the visual field[video]. 2021 Nov 4. https://scitok.com/project/p/a6ab696b
@online{al2006link, title={ Learning to see the Ebbinghaus illusion in the periphery reveals a top-down stabilization of size perception across the visual field }, author={ Seidel Malkinson, Tal }, organization={Scitok}, month={ Nov }, day={ 4 }, year={ 2021 }, url = {https://scitok.com/project/p/a6ab696b}, }