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  4. Electrophysiological signatures of crowding are similar in foveal and peripheral vision
 
conference paper

Electrophysiological signatures of crowding are similar in foveal and peripheral vision

Chicherov, Vitaly  
•
Herzog, Michael H.  
2013
Journal of Vision
Vision Sciences Society 13th Annual Meeting

Flankers can strongly deteriorate performance on a visual target (crowding). For example, vernier offset discrimination strongly deteriorates when neighbouring flankers are presented. Interestingly, performance for longer and shorter flankers is better than performance for flankers of the same length as the vernier. Based on these findings, we proposed that crowding is strongest when the vernier and the flankers group (same length flankers) and weaker when the vernier ungroups from the flankers (shorter or longer flankers). These effects were observed both in foveal and peripheral vision. Here, using high-density EEG, we show that electrophysiological signatures of crowding are also similar in foveal and peripheral vision. In both foveal and peripheral (3.9°) vision, the N1 wave correlated well with performance levels and, hence, with crowding. Amplitudes were highest for the long flankers, intermediate for the short flankers and lowest for the equal length flankers. This effect was observed neither at earlier stages of processing, nor in control conditions matched for stimulus energy. Effects are more pronounced in the fovea than in the periphery. These similarities are evidence for a common mechanism of crowding in both foveal and peripheral vision.

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Type
conference paper
DOI
10.1167/13.9.569
Author(s)
Chicherov, Vitaly  
Herzog, Michael H.  
Date Issued

2013

Publisher

Association for Research in Vision and Ophthalmology

Published in
Journal of Vision
Volume

13

Issue

9

Start page

569

Subjects

EEG

•

vision

•

crowding

•

foveal vision

•

peripheral vision

URL

URL

http://w.journalofvision.org/content/13/9/569.short
Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LPSY  
Event nameEvent placeEvent date
Vision Sciences Society 13th Annual Meeting

Naples, Florida, USA

2013

Available on Infoscience
January 28, 2014
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/100207
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