Overview of quantitative measurement methods. Equivalence, invariance, and differential item functioning in health applications. Medical Care, 44, S39-49. presented at the Nov.
. (2006). IRT health outcomes data analysis project: an overview and summary. Quality of Life Research, 16, 121-132.
. (2007). 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).