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Glossary

Classical Test Theory (CTT)

An alternative framework to understand¬†psychological testing to IRT. This conceptualises test scores as being made up of a ‘true’ score and error.

Glossary

Summary (bullet points)

Classical test theory is the most commonly used approach to psychometrics and considers test scores the result of a true score combined with measurement error.

Classification (s)

Research term

Classification (s)

Statistics

Foundational paper (s)

Cappelleri, Joseph C., J. Jason Lundy, and Ron D. Hays. “Overview of classical test theory and item response theory for the quantitative assessment of items in developing patient-reported outcomes measures.” Clinical therapeutics 36.5 (2014): 648-662.