ARTHRITIS & RHEUMATISM-ARTHRITIS CARE & RESEARCH, cilt.51, sa.1, ss.14-19, 2004 (SCI-Expanded, Scopus)
Objective. Guidelines have been established for cross-cultural adaptation of outcome measures. However, invariance across cultures must also be demonstrated through analysis of Differential Item Functioning (DIF). This is tested in the context of a Turkish adaptation of the Health Assessment Questionnaire (HAQ).