Revised Self-Report Assessment of Functional Visual Performance (R-SRAFVP)-Part II: Construct Validation.

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.