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	Teoria della Risposta all'Item a Forma Breve (SF-IRT)	Modello di Rasch
Campo	Psicometria	Psicometria
Famiglia	Latent structure	Latent structure
Anno di origine	1980s–2000s	1960
Ideatore	Multiple contributors; IRT adapted to short-form contexts from Lord & Novick (1968) and subsequent applied psychometricians	Georg Rasch
Tipo	Latent trait / item calibration model	Item Response Theory / Latent trait model
Fonte seminale	Embretson, S. E. & Reise, S. P. (2000). Item Response Theory for Psychologists. Lawrence Erlbaum Associates. ISBN: 978-0805828191	Rasch, G. (1960). Probabilistic Models for Some Intelligence and Attainment Tests. Danish Institute for Educational Research, Copenhagen.
Alias	SF-IRT, abbreviated scale IRT, short-form calibration, shortened instrument IRT	1PL IRT, one-parameter logistic model, Rasch Modeli — 1PL IRT, 1PL model
Correlati	6	6
Sintesi	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.	The Rasch model, introduced by Georg Rasch in 1960, is the simplest member of the Item Response Theory (IRT) family. It assigns a single difficulty parameter to each test item and places both item difficulties and person abilities on the same logit scale, enabling direct, sample-independent comparison of items and persons.