विधियों की तुलना करें

	लघु-रूप वस्तु प्रतिक्रिया सिद्धांत (SF-IRT)	विभेदक आइटम कार्यप्रणाली (DIF)
क्षेत्र	मनोमिति	मनोमिति
परिवार	Latent structure	Latent structure
उद्भव वर्ष	1980s–2000s	1970s–1993
प्रवर्तक	Multiple contributors; IRT adapted to short-form contexts from Lord & Novick (1968) and subsequent applied psychometricians	William H. Angoff and colleagues (ETS); systematized by Holland & Wainer
प्रकार	Latent trait / item calibration model	Item-level bias detection
मौलिक स्रोत	Embretson, S. E. & Reise, S. P. (2000). Item Response Theory for Psychologists. Lawrence Erlbaum Associates. ISBN: 978-0805828191	Holland, P. W. & Wainer, H. (Eds.) (1993). Differential Item Functioning. Lawrence Erlbaum Associates. ISBN: 978-0805809589
उपनाम	SF-IRT, abbreviated scale IRT, short-form calibration, shortened instrument IRT	DIF, item bias analysis, measurement non-equivalence, item-level measurement bias
संबंधित	6	5
सारांश	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.	Differential item functioning identifies test or survey items that behave differently for examinees from different groups — such as gender, ethnicity, or language background — after controlling for the underlying ability or trait being measured. DIF analysis is essential for fairness evaluation in educational testing and psychological scale development.