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. (1998). The effect of item pool restriction on the precision of ability measurement for a Rasch-based CAT: comparisons to traditional fixed length examinations. J Outcome Meas, 2, 97-122.
. (1999). Evaluating the usefulness of computerized adaptive testing for medical in-course assessment. Academic Medicine, 74, 1125-8. presented at the Oct.
. (1997). 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.
. (2006). Overview of quantitative measurement methods. Equivalence, invariance, and differential item functioning in health applications. Medical Care, 44, S39-49. presented at the Nov.
. (2003). Calibration of an item pool for assessing the burden of headaches: an application of item response theory to the Headache Impact Test (HIT). Quality of Life Research, 12, 913-933.
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