European Journal of Public Health · 2008 · 204 citations · 22 references
The control of DIF enables comparable and unbiased assessment of subjective health complaints across countries, age groups and gender. A scoring algorithm could be developed which enables a cross-cultural comparable and interval-scaled assessment of subjective health complaints.
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Fundamentals of item response theory
Choice Reviews Online · 1992 · 3.4K citations
A Rating Formulation for Ordered Response Categories
David Andrich · Psychometrika · 1978 · 2.9K citations