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Cortical idiosyncrasies predict the perception of object size

Moutsiana, C; de Haas, B; Papageorgiou, A; van Dijk, JA; Balraj, A; Greenwood, JA; Schwarzkopf, DS; (2016) Cortical idiosyncrasies predict the perception of object size. Nature Communications , 7 , Article 12110. 10.1038/ncomms12110. Green open access

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Abstract

Perception is subjective. Even basic judgments, like those of visual object size, vary substantially between observers and also across the visual field within the same observer. The way in which the visual system determines the size of objects remains unclear, however. We hypothesize that object size is inferred from neuronal population activity in V1 and predict that idiosyncrasies in cortical functional architecture should therefore explain individual differences in size judgments. Here we show results from novel behavioural methods and functional magnetic resonance imaging (fMRI) demonstrating that biases in size perception are correlated with the spatial tuning of neuronal populations in healthy volunteers. To explain this relationship, we formulate a population read-out model that directly links the spatial distribution of V1 representations to our perceptual experience of visual size. Taken together, our results suggest that the individual perception of simple stimuli is warped by idiosyncrasies in visual cortical organization.

Type: Article
Title: Cortical idiosyncrasies predict the perception of object size
Location: England
Open access status: An open access version is available from UCL Discovery
DOI: 10.1038/ncomms12110
Publisher version: http://dx.doi.org/10.1038/ncomms12110
Language: English
Additional information: Copyright © The Author(s) 2016. This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0). The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences > Div of Psychology and Lang Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences > Div of Psychology and Lang Sciences > Experimental Psychology
URI: http://discovery.ucl.ac.uk/id/eprint/1504513
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