Re-evaluating a vision-related quality of life questionnaire with item response theory (IRT) and differential item functioning (DIF) analyses

BACKGROUND: For the Low Vision Quality Of Life questionnaire (LVQOL) it is unknown whether the psychometric properties are satisfactory when an item response theory (IRT) perspective is considered. This study evaluates some essential psychometric properties of the LVQOL questionnaire in an IRT model...

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Autori principali: van Nispen, Ruth MA, Knol, Dirk L, Langelaan, Maaike, van Rens, Ger HMB
Natura: Artigo
Lingua:Inglês
Pubblicazione: BioMed Central 2011
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Research Article
Accesso online:https://ncbi.nlm.nih.gov/pmc/articles/PMC3201037/
https://ncbi.nlm.nih.gov/pubmed/21888648
https://ncbi.nlm.nih.govhttp://dx.doi.org/10.1186/1471-2288-11-125
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