Use of the Hermann grid illusion in the measurement of contrast perception in dyslexia

JM Gilchrist; BK Pierscionek; WM Mann

doi:10.1016/j.visres.2004.08.020

Use of the Hermann grid illusion in the measurement of contrast perception in dyslexia

JM Gilchrist, BK Pierscionek, WM Mann

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

Abstract

We measured contrast thresholds for perception of the Hermann grid illusion, using different contrast polarities and mean luminances, in dyslexics and non-dyslexics. Both groups of subjects gave significantly lower thresholds with grids having dark squares and light paths, but there was no significant threshold difference between groups. Perceived strength of illusion was also measured in grids at suprathreshold contrast levels. Dyslexics perceived the illusion to be significantly stronger than non-dyslexics when the grid had light paths and low luminance. (c) 2004 Elsevier Ltd. All rights reserved.

Original language	English
Pages (from-to)	1-8
Journal	Vision Research
Volume	45
Issue number	1
DOIs	https://doi.org/10.1016/j.visres.2004.08.020
Publication status	Published (in print/issue) - 2005

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10.1016/j.visres.2004.08.020

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title = "Use of the Hermann grid illusion in the measurement of contrast perception in dyslexia",

abstract = "We measured contrast thresholds for perception of the Hermann grid illusion, using different contrast polarities and mean luminances, in dyslexics and non-dyslexics. Both groups of subjects gave significantly lower thresholds with grids having dark squares and light paths, but there was no significant threshold difference between groups. Perceived strength of illusion was also measured in grids at suprathreshold contrast levels. Dyslexics perceived the illusion to be significantly stronger than non-dyslexics when the grid had light paths and low luminance. (c) 2004 Elsevier Ltd. All rights reserved.",

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N2 - We measured contrast thresholds for perception of the Hermann grid illusion, using different contrast polarities and mean luminances, in dyslexics and non-dyslexics. Both groups of subjects gave significantly lower thresholds with grids having dark squares and light paths, but there was no significant threshold difference between groups. Perceived strength of illusion was also measured in grids at suprathreshold contrast levels. Dyslexics perceived the illusion to be significantly stronger than non-dyslexics when the grid had light paths and low luminance. (c) 2004 Elsevier Ltd. All rights reserved.

AB - We measured contrast thresholds for perception of the Hermann grid illusion, using different contrast polarities and mean luminances, in dyslexics and non-dyslexics. Both groups of subjects gave significantly lower thresholds with grids having dark squares and light paths, but there was no significant threshold difference between groups. Perceived strength of illusion was also measured in grids at suprathreshold contrast levels. Dyslexics perceived the illusion to be significantly stronger than non-dyslexics when the grid had light paths and low luminance. (c) 2004 Elsevier Ltd. All rights reserved.

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DO - 10.1016/j.visres.2004.08.020

M3 - Article

VL - 45

SP - 1

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JO - Vision Research

JF - Vision Research

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Use of the Hermann grid illusion in the measurement of contrast perception in dyslexia

Abstract

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