Methoden vergleichen

	Short-Form Item Response Theory (SF-IRT)	Kurzform-konfirmatorische Faktorenanalyse (SF-CFA)
Fachgebiet	Psychometrie	Psychometrie
Familie	Latent structure	Latent structure
Entstehungsjahr	1980s–2000s	1990s–2000s
Urheber	Multiple contributors; IRT adapted to short-form contexts from Lord & Novick (1968) and subsequent applied psychometricians	Building on CFA methodology (Jöreskog, 1969) applied to abbreviated scale contexts
Typ	Latent trait / item calibration model	Confirmatory latent-variable model
Wegweisende Quelle	Embretson, S. E. & Reise, S. P. (2000). Item Response Theory for Psychologists. Lawrence Erlbaum Associates. ISBN: 978-0805828191	Byrne, B. M. (2008). Structural Equation Modeling with EQS: Basic Concepts, Applications, and Programming (2nd ed.). Lawrence Erlbaum Associates. ISBN: 978-0805841268
Aliasnamen	SF-IRT, abbreviated scale IRT, short-form calibration, shortened instrument IRT	SF-CFA, abbreviated scale CFA, short-form validation, brief scale factor analysis
Verwandt	6	4
Zusammenfassung	Short-form item response theory applies IRT calibration and scoring to abbreviated or shortened psychological scales. It uses item information functions to guide which items to retain from a full-length instrument, then estimates latent trait scores from the reduced item set while preserving psychometric rigor and linkage to the full-scale metric.	Short-form confirmatory factor analysis applies CFA to a reduced subset of items drawn from a longer validated scale, testing whether the abbreviated version preserves the original factor structure with acceptable model fit and reliability. It is a standard step in short-form scale development and validation.