Document Detail


Measuring contrast sensitivity.
MedLine Citation:
PMID:  23643905     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Contrast sensitivity defines the threshold between the visible and invisible, which has obvious significance for basic and clinical vision science. Fechner's 1860 review reported that threshold contrast is 1% for a remarkably wide range of targets and conditions. While printed charts are still in use, computer testing is becoming more popular because it offers efficient adaptive measurement of threshold for a wide range of stimuli. Both basic and clinical studies usually want to know fundamental visual capability, regardless of the observer's subjective criterion. Criterion effects are minimized by the use of an objective task: multiple-alternative forced-choice detection or identification. Having many alternatives reduces the guessing rate, which makes each trial more informative, so fewer trials are needed. Finally, populations who may experience crowding or target confusion should be tested with one target at a time.
Authors:
Denis G Pelli; Peter Bex
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Publication Detail:
Type:  Journal Article; Research Support, N.I.H., Extramural     Date:  2013-05-03
Journal Detail:
Title:  Vision research     Volume:  90     ISSN:  1878-5646     ISO Abbreviation:  Vision Res.     Publication Date:  2013 Sep 
Date Detail:
Created Date:  2013-08-14     Completed Date:  2014-02-04     Revised Date:  2014-10-01    
Medline Journal Info:
Nlm Unique ID:  0417402     Medline TA:  Vision Res     Country:  England    
Other Details:
Languages:  eng     Pagination:  10-4     Citation Subset:  IM    
Copyright Information:
Copyright © 2013 The Authors. Published by Elsevier Ltd.. All rights reserved.
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MeSH Terms
Descriptor/Qualifier:
Contrast Sensitivity / physiology*
Humans
Psychometrics
Sensory Thresholds / physiology
Vision Tests / methods*
Vision, Low / diagnosis*
Grant Support
ID/Acronym/Agency:
R01 EY004432/EY/NEI NIH HHS; R01EY018664/EY/NEI NIH HHS; R01EY019281/EY/NEI NIH HHS; R01EY04432/EY/NEI NIH HHS
Comments/Corrections

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