“Introduction to Item Response Theory "
Item response theory (IRT) is a method for the design, analysis, and scoring of tests, questionnaires, and similar instruments measuring abilities or attitudes. The purpose of IRT is to provide a framework for evaluating how well tests work along with how how well individual items on tests work. Historically, IRT has been routinely used in educational achievement testing. More recently, IRT has been used in the Patient Reported Outcomes Measurement Information System (PROMIS), funded by the National Institutes of Health (NIH), to develop a system of highly reliable, valid, flexible, precise, and responsive assessment tools that measure patient–reported health status. This presentation will provide an introduction to the basic concepts of IRT.
Scott R Millis, PhD, ABPP is Professor at Wayne State University in the Department of Physical Medicine and Rehabilitation. He is a Chartered Statistician (CStat) by the British Royal Statistical Society and an acrredited Professional Statistician (PStat) by the American Statistical Association.