What is the primary cause of individual differences in contrast sensitivity?

One of the primary objectives of early visual processing is the detection of luminance variations, often termed image contrast. Normal observers can differ in this ability by at least a factor of 4, yet this variation is typically overlooked, and has never been convincingly explained. This study use...

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Autor principal:	Daniel H Baker
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2013
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/fe4371263634449c81654af6b85caca6
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spelling	oai:doaj.org-article:fe4371263634449c81654af6b85caca62021-11-18T09:02:44ZWhat is the primary cause of individual differences in contrast sensitivity?1932-620310.1371/journal.pone.0069536https://doaj.org/article/fe4371263634449c81654af6b85caca62013-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/23922732/?tool=EBIhttps://doaj.org/toc/1932-6203One of the primary objectives of early visual processing is the detection of luminance variations, often termed image contrast. Normal observers can differ in this ability by at least a factor of 4, yet this variation is typically overlooked, and has never been convincingly explained. This study uses two techniques to investigate the main source of individual variations in contrast sensitivity. First, a noise masking experiment assessed whether differences were due to the observer's internal noise, or the efficiency with which they extracted information from the stimulus. Second, contrast discrimination functions from 18 previous studies were compared (pairwise, within studies) using a computational model to determine whether differences were due to internal noise or the low level gain properties of contrast transduction. Taken together, the evidence points to differences in contrast gain as being responsible for the majority of individual variation across the normal population. This result is compared with related findings in attention and amblyopia.Daniel H BakerPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 8, Iss 7, p e69536 (2013)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Daniel H Baker What is the primary cause of individual differences in contrast sensitivity?
description	One of the primary objectives of early visual processing is the detection of luminance variations, often termed image contrast. Normal observers can differ in this ability by at least a factor of 4, yet this variation is typically overlooked, and has never been convincingly explained. This study uses two techniques to investigate the main source of individual variations in contrast sensitivity. First, a noise masking experiment assessed whether differences were due to the observer's internal noise, or the efficiency with which they extracted information from the stimulus. Second, contrast discrimination functions from 18 previous studies were compared (pairwise, within studies) using a computational model to determine whether differences were due to internal noise or the low level gain properties of contrast transduction. Taken together, the evidence points to differences in contrast gain as being responsible for the majority of individual variation across the normal population. This result is compared with related findings in attention and amblyopia.
format	article
author	Daniel H Baker
author_facet	Daniel H Baker
author_sort	Daniel H Baker
title	What is the primary cause of individual differences in contrast sensitivity?
title_short	What is the primary cause of individual differences in contrast sensitivity?
title_full	What is the primary cause of individual differences in contrast sensitivity?
title_fullStr	What is the primary cause of individual differences in contrast sensitivity?
title_full_unstemmed	What is the primary cause of individual differences in contrast sensitivity?
title_sort	what is the primary cause of individual differences in contrast sensitivity?
publisher	Public Library of Science (PLoS)
publishDate	2013
url	https://doaj.org/article/fe4371263634449c81654af6b85caca6
work_keys_str_mv	AT danielhbaker whatistheprimarycauseofindividualdifferencesincontrastsensitivity
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What is the primary cause of individual differences in contrast sensitivity?

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