Psychometric evaluation and calibration of health-related quality of life item banks: plans for the Patient-Reported Outcomes Measurement Information System (PROMIS). Medical Care, 45, S22-31. presented at the May.. (2007).
Health status assessment for the twenty-first century: item response theory, item banking and computer adaptive testing. Quality of Life Research, 6, 595-600. presented at the Aug.. (1997).