Visual functioning questionnaire: reevaluation of psychometric properties for a group of working-age
The Visual Functioning Questionnaire (VFQ-25) is one of the most widely used measures of vision-related quality of life. However, the questionnaire does not meet some psychometric quality criteria. The objectives of this study were first to obtain the factor structure of the VFQ-25, and second, to obtain interval scales by Rasch analysis.
Type of publication:Scientific publications
Date of publication:01/08/2007
Author(s):Langelaan, M; Nispen, Ruth van [et al.]
Publishing organization:Optometry and vision science
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Published in: Optometry & Vision Science, 2007. Vol. 84, Issue 8, pp. 775-784.