Graded response model-based item selection for behavior and symptom identification

• Published in: Health services and outcomes research methodology Vol. 6; no. 1-2; pp. 1 - 19
• Main Authors: Normand, Sharon-Lise T., Belanger, Albert J., Eisen, Susan V.
• Format: Journal Article
• Language: English
• Published: Dordrecht Springer Nature B.V 01.06.2006
• Subjects: Data analysis; Discriminant analysis; Drug use; Health care; Health care policy; Health services; Item response theory; Mental disorders; Mental health; Mental health care; Patients; Quality of life; Quantitative psychology; Studies

In measuring outcomes of health care, information is obtained from subjects employing instruments that often use Likert scales. These instruments are typically designed using classical testing theory which assumes the errors around the true scores are normally distributed and constant. Advances in p...