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	Teoria della Generalizzabilità per Forme Brevi	Analisi di affidabilità della forma breve
Campo	Psicometria	Psicometria
Famiglia	Latent structure	Latent structure
Anno di origine	1963–1972 (G-theory); short-form extension ongoing from 1980s	1990s–2000s
Ideatore	Lee J. Cronbach, Goldine Gleser, Harinder Nanda, Nageswari Rajaratnam	Conventional practice; codified notably by Smith, McCarthy & Anderson (2000) and Stanton et al. (2002)
Tipo	Reliability / decision-study framework	Scale development / psychometric evaluation
Fonte seminale	Brennan, R. L. (2001). Generalizability Theory. Springer. ISBN: 978-0387952826	Stanton, J. M., Sinar, E. F., Balzer, W. K. & Smith, P. C. (2002). Issues and strategies for reducing the length of self-report scales. Personnel Psychology, 55(1), 167–194.
Alias	G-theory for abbreviated scales, short-form G-study, abbreviated test generalizability, short-form D-study	abbreviated scale reliability, short-form validation, scale shortening, item reduction reliability
Correlati	5	6
Sintesi	Short form generalizability theory applies the G-theory variance-component framework to abbreviated measurement instruments, using G-studies and D-studies to estimate how many items a short scale must retain to achieve a desired reliability and to evaluate the accuracy of decisions made with a condensed instrument.	Short-form reliability analysis evaluates whether an abbreviated version of a psychological scale maintains acceptable internal consistency, validity, and structural integrity after items are removed. It is used in survey and assessment research to create briefer instruments that reduce respondent burden without sacrificing measurement quality.