Marlene Snow1, Mary Warren2, Hon K Yuen3. 1. Marlene Snow, MS, OTR/L, SCLV, is Health Educator and Low Vision Specialist, NewView Oklahoma, OKC Low Vision Clinic, Oklahoma City. 2. Mary Warren, PhD, OTR/L, SCLV, FAOTA, is Associate Professor and Director, Graduate Certificate in Low Vision Rehabilitation program, Department of Occupational Therapy, School of Health Professions, University of Alabama at Birmingham. 3. Hon K. Yuen, PhD, OTR/L, is Professor and Director of Research, Department of Occupational Therapy, School of Health Professions, University of Alabama at Birmingham; yuen@uab.edu.
Abstract
OBJECTIVE: Our objective was to validate the construct of the Revised Self-Report Assessment of Functional Visual Performance (R-SRAFVP) for older adults with low vision resulting from age-related eye disease. METHOD: The 50-item draft of the R-SRAFVP was administered to 87 older adults with low vision. Construct validation included principal-components analysis and the known-groups method. RESULTS: Principal-components analysis revealed nine components (comprising 33 items): Personal Care, Oral Care, Meal/Laundry Preparation, Financial Management, Telephone Usage, Personal Preference Activities, Reading, Writing, and Functional Mobility. Cronbach's α ranged from .72 to .84 for individual components and was .92 overall. Known-groups comparisons showed that participants with moderate to profound acuity loss or contrast sensitivity deficits reported significantly greater difficulty completing tasks on the R-SRAFVP than those with milder acuity loss or normal contrast sensitivity. CONCLUSION: The 33-item R-SRAFVP demonstrates adequate evidence of reliability and validity to evaluate the ability of older adults with low vision to complete vision-dependent activities of daily living.
OBJECTIVE: Our objective was to validate the construct of the Revised Self-Report Assessment of Functional Visual Performance (R-SRAFVP) for older adults with low vision resulting from age-related eye disease. METHOD: The 50-item draft of the R-SRAFVP was administered to 87 older adults with low vision. Construct validation included principal-components analysis and the known-groups method. RESULTS: Principal-components analysis revealed nine components (comprising 33 items): Personal Care, Oral Care, Meal/Laundry Preparation, Financial Management, Telephone Usage, Personal Preference Activities, Reading, Writing, and Functional Mobility. Cronbach's α ranged from .72 to .84 for individual components and was .92 overall. Known-groups comparisons showed that participants with moderate to profound acuity loss or contrast sensitivity deficits reported significantly greater difficulty completing tasks on the R-SRAFVP than those with milder acuity loss or normal contrast sensitivity. CONCLUSION: The 33-item R-SRAFVP demonstrates adequate evidence of reliability and validity to evaluate the ability of older adults with low vision to complete vision-dependent activities of daily living.