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  4. Contrast polarity, chromaticity, and stereoscopic depth modulate contextual interactions in vernier acuity
 
research article

Contrast polarity, chromaticity, and stereoscopic depth modulate contextual interactions in vernier acuity

Sayim, Bilge
•
Westheimer, Gerald
•
Herzog, Michael H.  
2008
Journal of vision

Vernier alignment thresholds are strongly compromised when the vernier is embedded in an array of equal-length flanking lines. Here, we show that these contextual interactions can be diminished by giving the flanks the opposite contrast polarity, e.g., white flanks surrounding a black vernier. Similar results are obtained for red verniers and equiluminant green flanks and when vernier and flanks have different binocular disparity. Using special flank configurations, we can eliminate location uncertainty as an important factor for this kind of contextual interactions. We interpret these results as evidence that perceptual grouping of the vernier and the flanks plays an important role in the vernier threshold elevation caused by contextual flanks.

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Type
research article
DOI
10.1167/8.8.12
Web of Science ID

WOS:000258708900012

Author(s)
Sayim, Bilge
Westheimer, Gerald
Herzog, Michael H.  
Date Issued

2008

Publisher

Association for Research in Vision and Ophthalmology

Published in
Journal of vision
Volume

8

Issue

8

Start page

12.1

End page

9

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LPSY  
Available on Infoscience
March 23, 2010
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/48462
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