The illusion of uniformity does not depend on the primary visual cortex: evidence from sensory adaptation

Suárez-Pinilla, Marta, Seth, Anil and Roseboom, Warrick (2018) The illusion of uniformity does not depend on the primary visual cortex: evidence from sensory adaptation. i-Perception, 9 (5). pp. 1-13. ISSN 2041-6695

[img] PDF - Published Version
Available under License Creative Commons Attribution.

Download (646kB)
[img] PDF - Accepted Version
Download (1MB)


Visual experience appears richly detailed despite the poor resolution of the majority of the visual field, thanks to foveal-peripheral integration. The recently described Uniformity Illusion (UI), wherein peripheral elements of a pattern take on the appearance of foveal elements, may shed light on this integration. We examined the basis of UI by generating adaptation to a pattern of Gabors suitable for producing UI on orientation. After removing the pattern, participants reported the tilt of a single peripheral Gabor. The tilt after-effect followed the physical adapting orientation rather than the global orientation perceived under UI, even when the illusion had been reported for a long time. Conversely, a control experiment replacing illusory uniformity with a physically uniform Gabor pattern for the same durations did produce an after-effect to the global orientation. Results indicate that UI is not associated with changes in sensory encoding at V1, but likely depends on higher-level processes.

Item Type: Article
Schools and Departments: School of Engineering and Informatics > Informatics
Research Centres and Groups: Centre for Computational Neuroscience and Robotics
Sackler Centre for Consciousness Science
Subjects: R Medicine > RC Internal medicine > RC0321 Neurosciences. Biological psychiatry. Neuropsychiatry
Depositing User: Marianne Cole
Date Deposited: 29 Aug 2018 08:52
Last Modified: 30 Oct 2018 16:49

View download statistics for this item

📧 Request an update