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The Channel for Detecting Contrast Modulation also responds to Density Modulation (or Vice Versa)

Morgan, M., Macleod, D. and Solomon, J. A. ORCID: 0000-0001-9976-4788 (2021). The Channel for Detecting Contrast Modulation also responds to Density Modulation (or Vice Versa). Vision Research,

Abstract

In textures composed of black and white dots, we modulated dot density and/or dot contrast in one direction of visual space. Just as Mulligan and MacLeod (1988) found a strong reciprocity between density and luminance for dots viewed against a darker background, we found a strong reciprocity between density and contrast: detection thresholds for in-phase modulations of density and contrast were 30% - 55% lower than detection thresholds for density and contrast modulations that were 180° out of phase. These findings support the existence of at least one psychophysical channel that is excited by both density modulations and contrast modulations. A good, quantitative fit to our data can be obtained with a two-channel model.

Publication Type: Article
Additional Information: © 2021. This manuscript version is made available under the CC-BY-NC-ND 4.0 license https://creativecommons.org/licenses/by-nc-nd/4.0. This article has been accepted for publication in Vision Research, Elsevier.
Subjects: Q Science > QC Physics
R Medicine > RE Ophthalmology
Departments: School of Health Sciences > Optometry & Visual Science
Date available in CRO: 27 Aug 2021 15:03
Date deposited: 27 August 2021
Date of acceptance: 19 August 2021
URI: https://openaccess.city.ac.uk/id/eprint/26675
[img] Text - Accepted Version
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Available under License Creative Commons Attribution Non-commercial No Derivatives.

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