Baker, Daniel Hart orcid.org/0000-0002-0161-443X (2017) Decoding eye-of-origin outside of awareness. Neuroimage. pp. 89-96. ISSN 1053-8119
Abstract
In the primary visual cortex of many mammals, ocular dominance columns segregate information from the two eyes. Yet under controlled conditions, most human observers are unable to correctly report the eye to which a stimulus has been shown, indicating that this information is lost during subsequent processing. This study investigates whether eye-of-origin information is available in the pattern of electrophysiological activity evoked by visual stimuli, recorded using EEG and decoded using multivariate pattern analysis. Observers (N=24) viewed sine-wave grating and plaid stimuli of different orientations, shown to either the left or right eye (or both). Using a support vector machine, eye-of-origin could be decoded above chance at around 140 and 220ms post stimulus onset, yet observers were at chance for reporting this information. Other stimulus features, such as binocularity, orientation, spatial pattern, and the presence of interocular conflict (i.e. rivalry), could also be decoded using the same techniques, though all of these were perceptually discriminable above chance. A control analysis found no evidence to support the possibility that eye dominance was responsible for the eye-of-origin effects. These results support a structural explanation for multivariate decoding of electrophysiological signals – information organised in cortical columns can be decoded, even when observers are unaware of this information.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © Elsevier Ltd, 2016. This is an author-produced version of the published paper. Uploaded in accordance with the publisher’s self-archiving policy. |
Keywords: | MVPA,cortical columns,Awareness,binocular vision |
Dates: |
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Institution: | The University of York |
Academic Units: | The University of York > Faculty of Sciences (York) > Psychology (York) |
Depositing User: | Pure (York) |
Date Deposited: | 08 Dec 2016 10:06 |
Last Modified: | 07 Nov 2024 01:23 |
Published Version: | https://doi.org/10.1016/j.neuroimage.2016.12.008 |
Status: | Published |
Refereed: | Yes |
Identification Number: | 10.1016/j.neuroimage.2016.12.008 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:109200 |
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