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Lower Internal Additive Noise and Better Perceptual Template Characterize Binocular Contrast Sensitivity Summation
Binocular summation is generally defined as the superiority of binocular over monocular performance. Here, we investigated how external noise modulates the effect of binocular summation on the contrast sensitivity function (CSF) and clarified the corresponding mechanisms with a perceptual template m...
Autores principales: | , , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Frontiers Media S.A.
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8514620/ https://www.ncbi.nlm.nih.gov/pubmed/34659058 http://dx.doi.org/10.3389/fpsyg.2021.740759 |
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author | Zhang, Pan Wang, Hanlin Ren, Weicong Lu, Qing Li, Chenxi Chen, Ge Zhang, Shilei Tao, Jiayu Li, Ying Wu, Di Wang, Zeng |
author_facet | Zhang, Pan Wang, Hanlin Ren, Weicong Lu, Qing Li, Chenxi Chen, Ge Zhang, Shilei Tao, Jiayu Li, Ying Wu, Di Wang, Zeng |
author_sort | Zhang, Pan |
collection | PubMed |
description | Binocular summation is generally defined as the superiority of binocular over monocular performance. Here, we investigated how external noise modulates the effect of binocular summation on the contrast sensitivity function (CSF) and clarified the corresponding mechanisms with a perceptual template model (PTM). The contrast sensitivity (CS) over 10 spatial frequencies and three external noise levels was assessed under one binocular and two monocular viewing conditions. The binocular summation ratio (BSR) was calculated by dividing the area under the log CSF (AULCSF), or the CS of using both eyes, by that of only using the “good eye” (BSRG) or the “bad eye” (BSRB), respectively. We found that: (1) based on the AULCSF, the BSRB was higher than the BSRG; (2) based on the AULCSF, the BSR was more pronounced under zero-noise than under low-noise conditions, but the BSR was not higher than 1 under high-noise conditions due to a large individual difference; (3) based on the CS, with increasing spatial frequencies, the BSRB steadily increased; (4) both decreased internal additive noise and an improved perceptual template accounted for the gain in binocular summation. These results help us better understand the features of binocular CS and shed light on the clinical studies on populations with monocular CS loss. |
format | Online Article Text |
id | pubmed-8514620 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | Frontiers Media S.A. |
record_format | MEDLINE/PubMed |
spelling | pubmed-85146202021-10-15 Lower Internal Additive Noise and Better Perceptual Template Characterize Binocular Contrast Sensitivity Summation Zhang, Pan Wang, Hanlin Ren, Weicong Lu, Qing Li, Chenxi Chen, Ge Zhang, Shilei Tao, Jiayu Li, Ying Wu, Di Wang, Zeng Front Psychol Psychology Binocular summation is generally defined as the superiority of binocular over monocular performance. Here, we investigated how external noise modulates the effect of binocular summation on the contrast sensitivity function (CSF) and clarified the corresponding mechanisms with a perceptual template model (PTM). The contrast sensitivity (CS) over 10 spatial frequencies and three external noise levels was assessed under one binocular and two monocular viewing conditions. The binocular summation ratio (BSR) was calculated by dividing the area under the log CSF (AULCSF), or the CS of using both eyes, by that of only using the “good eye” (BSRG) or the “bad eye” (BSRB), respectively. We found that: (1) based on the AULCSF, the BSRB was higher than the BSRG; (2) based on the AULCSF, the BSR was more pronounced under zero-noise than under low-noise conditions, but the BSR was not higher than 1 under high-noise conditions due to a large individual difference; (3) based on the CS, with increasing spatial frequencies, the BSRB steadily increased; (4) both decreased internal additive noise and an improved perceptual template accounted for the gain in binocular summation. These results help us better understand the features of binocular CS and shed light on the clinical studies on populations with monocular CS loss. Frontiers Media S.A. 2021-09-30 /pmc/articles/PMC8514620/ /pubmed/34659058 http://dx.doi.org/10.3389/fpsyg.2021.740759 Text en Copyright © 2021 Zhang, Wang, Ren, Lu, Li, Chen, Zhang, Tao, Li, Wu and Wang. https://creativecommons.org/licenses/by/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms. |
spellingShingle | Psychology Zhang, Pan Wang, Hanlin Ren, Weicong Lu, Qing Li, Chenxi Chen, Ge Zhang, Shilei Tao, Jiayu Li, Ying Wu, Di Wang, Zeng Lower Internal Additive Noise and Better Perceptual Template Characterize Binocular Contrast Sensitivity Summation |
title | Lower Internal Additive Noise and Better Perceptual Template Characterize Binocular Contrast Sensitivity Summation |
title_full | Lower Internal Additive Noise and Better Perceptual Template Characterize Binocular Contrast Sensitivity Summation |
title_fullStr | Lower Internal Additive Noise and Better Perceptual Template Characterize Binocular Contrast Sensitivity Summation |
title_full_unstemmed | Lower Internal Additive Noise and Better Perceptual Template Characterize Binocular Contrast Sensitivity Summation |
title_short | Lower Internal Additive Noise and Better Perceptual Template Characterize Binocular Contrast Sensitivity Summation |
title_sort | lower internal additive noise and better perceptual template characterize binocular contrast sensitivity summation |
topic | Psychology |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8514620/ https://www.ncbi.nlm.nih.gov/pubmed/34659058 http://dx.doi.org/10.3389/fpsyg.2021.740759 |
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