Statistical inference with item response theory models, useful to measure an individual's performance on a test or questionnaire. Models include parametric, non-parametric, unidimensional, multidimensional, and cognitive. Course Information: May be repeated for a maximum of 8 hours. Previously listed as EPSY 506. Extensive computer use required. Prerequisite(s): EPSY 503 and EPSY 546 or the equivalent. Graduate or professional standing required or consent of the instructor.