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

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Version 1 2023-06-09, 14:50
journal contribution
posted on 2023-06-12, 07:25 authored by Marta Suárez-Pinilla, Anil SethAnil Seth, Warrick RoseboomWarrick Roseboom
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.

History

Publication status

  • Published

File Version

  • Published version

Journal

i-Perception

ISSN

2041-6695

Publisher

SAGE Publications

Issue

5

Volume

9

Page range

1-13

Department affiliated with

  • Informatics Publications

Research groups affiliated with

  • Centre for Computational Neuroscience and Robotics Publications
  • Sackler Centre for Consciousness Science Publications

Full text available

  • Yes

Peer reviewed?

  • Yes

Legacy Posted Date

2018-08-29

First Open Access (FOA) Date

2018-08-29

First Compliant Deposit (FCD) Date

2018-08-28

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