| Retest variability of human infant contrast sensitivity: how many tests are sufficient? | |
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MedLine Citation:
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PMID: 10701807 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Retest variability of a new infant contrast sensitivity (CS) card procedure was assessed by binocular measurement of a group of 20 6-month-olds twice within a 1-week period. Coefficient of reliability analyses showed that within-subject variability between tests was only slightly less than variation across subjects, which suggests that results from a single test are a poor predictor of an infant's "true" visual functioning. To determine how many tests are needed to estimate when infant CS stabilizes to within an acceptable (0.15 log unit) criterion, a second experiment was conducted in which a small group of subjects was tested repeatedly over a 2-week period. The results showed that averaging performance on 2 to 3 tests was required before an accurate estimate of the subject's performance could be obtained. Our results suggest that caution should be taken in the interpretation of a single measurement of infant visual functioning. |
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Authors:
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R J Adams; M L Courage; J R Drover |
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Publication Detail:
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Type: Comparative Study; Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Optometry and vision science : official publication of the American Academy of Optometry Volume: 77 ISSN: 1040-5488 ISO Abbreviation: Optom Vis Sci Publication Date: 2000 Feb |
Date Detail:
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Created Date: 2000-03-29 Completed Date: 2000-03-29 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 8904931 Medline TA: Optom Vis Sci Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 90-5 Citation Subset: IM |
Affiliation:
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Department of Psychology, Memorial University of Newfoundland, St. John's, Canada. michelem@morgan.ucs.mun.ca |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Contrast Sensitivity
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physiology* Female Humans Infant Male Observer Variation Reproducibility of Results Vision Tests / standards* Vision, Binocular / physiology |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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