Models of reading performance in older adults with normal age-related vision

Reading rate with print size (reading performance) was studied in a group of 132 older readers with normal age-related vision using the Minnesota Low Vision Reading Acuity (MNREAD) test. Regression by a monotonic Weibull model had greater convergence success with lower residual error than either Log...

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Bibliographic Details
Published inJournal of rehabilitation research and development Vol. 45; no. 6; pp. 901 - 910
Main Author Nygaard, Rolf W.
Format Journal Article
LanguageEnglish
Published United States Department of Veterans Affairs 01.01.2008
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Subjects
Aged
Analysis
Diabetic retinopathy
Eye
Eye movements
Field study
Health aspects
Health Insurance Portability & Accountability Act 1996-US
Human subjects
Humans
Medical examination
Models, Statistical
Older people
Physiological aspects
R&D
Reading
Reading skills
Regression Analysis
Research & development
Vision Tests
Vision, Low
Visual Acuity
United States
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Summary:Reading rate with print size (reading performance) was studied in a group of 132 older readers with normal age-related vision using the Minnesota Low Vision Reading Acuity (MNREAD) test. Regression by a monotonic Weibull model had greater convergence success with lower residual error than either Logistic or Gompertz models. Reading performance by Weibull model regression was characterized by inflexion slope, critical print size, and maximum reading rate. Successive shortening of the data set length before regression by the monotonic Weibull model gave decreased fitting error. This finding suggests that some individual reading rates, rather than asymptoting at the largest print size, may give nonsigmoidal responses. Shortening the data set length decreases regression error but significantly changes regression parameter values. A nonmonotonic Weibull model that was sensitive to declining reading rate at large print size improved regression on 22% of our data. This result indicates that a subgroup of subjects had response falloff at large print size and reading performance characteristics that included incremental and decremental reading rate slopes at different print sizes, which were separated by a reading rate plateau.
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ISSN:0748-7711
1938-1352
1938-1352
DOI:10.1682/JRRD.2007.08.0132