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research article

Intact crowding and temporal masking in dyslexia

Doron, Adi
•
Manassi, Mauro  
•
Herzog, Michael H.  
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2015
Journal of Vision

Phonological deficits in dyslexia are well documented. However, there is an ongoing discussion about whether visual deficits limit the reading skills of people with dyslexia. Here, we investigated visual crowding and backward masking. We presented a Vernier (i.e., two vertical bars slightly offset to the left or right) and asked observers to indicate the offset direction. Vernier stimuli are visually similar to letters and are strongly affected by crowding, even in the fovea. To increase task difficulty, Verniers are often followed by a mask (i.e., backward masking). We measured Vernier offset discrimination thresholds for the basic Vernier task, under crowding, and under backward masking, in students with dyslexia (n = 19) and age and intelligence matched students (n = 27). We found no group differences in any of these conditions. Controls with fast visual processing (good backward masking performance), were faster readers. By contrast, no such correlation was found among the students with dyslexia, suggesting that backward masking does not limit their reading efficiency. These findings indicate that neither elevated crowding nor elevated backward masking pose a bottleneck to reading skills of people with dyslexia.

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Type
research article
DOI
10.1167/15.14.13
Web of Science ID

WOS:000368252200013

Author(s)
Doron, Adi
Manassi, Mauro  
Herzog, Michael H.  
Ahissar, Merav
Date Issued

2015

Publisher

Association for Research in Vision and Ophthalmology

Published in
Journal of Vision
Volume

15

Issue

14

Start page

13.1

End page

17

Subjects

dyslexia

•

reading disability

•

crowding

•

backward masking

•

visual efficiency

•

Vernier

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LPSY  
Available on Infoscience
February 16, 2016
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/123591
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