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Re-evaluating a vision-related quality of life questionnaire with item response theory (IRT) and differential item functioning (DIF) analyses.
- Source :
- BMC Medical Research Methodology; 2011, Vol. 11 Issue 1, p125-134, 10p, 3 Charts, 7 Graphs
- Publication Year :
- 2011
-
Abstract
- The article presents information on a study which tests some essential psychometric properties of the Low Vision Quality Of Life (LVQOL) questionnaire in an item response theory (IRT) model, along with evaluating differential item functioning (DIF). It used cross-sectional data from an observational study involving visually-impaired patients.
Details
- Language :
- English
- ISSN :
- 14712288
- Volume :
- 11
- Issue :
- 1
- Database :
- Complementary Index
- Journal :
- BMC Medical Research Methodology
- Publication Type :
- Academic Journal
- Accession number :
- 66557734
- Full Text :
- https://doi.org/10.1186/1471-2288-11-125