Item Response Theory (IRT) or modelling is a psychometric approach which seeks to understand the properties of assessments and their questions (items) via probabilistic modelling. That is, the relationship between an item’s properties and the probability of a candidate answering in a certain way is modelled using probability distributions. This is in contrast to classicial test theory (see below). Rasch analysis is usually considered as a special case of IRT (see also below)
Glossary
Item Response Theory (IRT)
Glossary
Summary (bullet points)
IRT models test and item properties in a probabilistic manner
Classification (s)
Research term
Classification (s)
Statistics