Journal article
Rasch analysis of visual function and quality of life questionnaires
VK Gothwal, TA Wright, EL Lamoureux, K Pesudovs
Optometry and Vision Science | Published : 2009
Abstract
Purpose. To investigate the psychometric properties of the Visual Function (VF) and Quality of Life (QOL) questionnaires, using the Rasch measurement model. Methods. Four hundred eighty-nine patients with cataract awaiting surgery, drawn from the surgical waiting list of the Flinders Medical Centre, Adelaide, South Australia, were mailed the VF and QOL questionnaires for self-administration. Rasch analysis was undertaken to assess the following properties: measurement of a single construct (i.e., unidimensionality by fit statistics and principal components analysis), discrimination between strata of participant ability (person separation, recommended minimum value 2.0), targeting of item dif..
View full abstractGrants
Awarded by National Health and Medical Research Council (Canberra, Australia) Centre of Clinical Research Excellence Grant
Awarded by National Health and Medical Research Council (Canberra, Australia) Career Development Award
Funding Acknowledgements
This work was supported, in part, by National Health and Medical Research Council (Canberra, Australia) Centre of Clinical Research Excellence Grant 264620. Konrad Pesudovs is supported by National Health and Medical Research Council (Canberra, Australia) Career Development Award 426765.