Classical Test Theory (CTT)

Classical Test Theory (CTT) is a framework used in psychometrics to understand and improve tests and assessments. It assumes that an individual's observed test score is made up of their true ability plus some measurement error. The goal is to design tests that reliably reflect true ability by minimizing errors. CTT helps estimate a person's actual skill level and the reliability of the test, guiding improvements in test design to ensure consistent and accurate measurement across different situations and administrations.