Import results from the calibration and store with items
What is Item Response Theory?
Item response theory (IRT) is a psychometric paradigm used to design, develop, assemble, deliver, score, and analyze assessments. It offers many advantages over its predecessor, classical test theory, by implementing more sophisticated mathematical modeling. Most large-scale assessments that you can think of, from professional certifications up to worldwide assessments like PISA, utilize IRT.
The basic building block of IRT is the item response function, which describes the probability of a given response as a function of a person’s true standing on a latent trait or ability. As you would expect, students of higher ability have a higher probability of a correct response, but this probability of course cannot exceed 1.0.