The Channel for Detecting Contrast Modulation also responds to Density Modulation (or Vice Versa)
Morgan, M., Macleod, D. & Solomon, J. A. 
ORCID: 0000-0001-9976-4788 (2022).
The Channel for Detecting Contrast Modulation also responds to Density Modulation (or Vice Versa).
Vision Research, 192,
107948.
doi: 10.1016/j.visres.2021.08.003
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. |
| Publisher Keywords: | Texture, Density, Numerosity, Contrast, Signal detection |
| Subjects: | Q Science > QC Physics R Medicine > RE Ophthalmology |
| Departments: | School of Health & Psychological Sciences > Optometry & Visual Sciences |
Available under License Creative Commons Attribution Non-commercial No Derivatives.
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