IRT (Item Response Theory)

Item Response Theory (IRT) is a statistical framework used to evaluate and improve assessments, such as tests or surveys. It examines how individual questions (items) relate to a person's underlying ability or trait, like math skills or anxiety level. IRT models the probability that someone with a certain ability level will answer a question correctly or agree with a statement. This approach helps create more accurate, fair assessments by accounting for question difficulty and discriminative power, allowing for personalized measurements and better understanding of individual differences.