Vertaile menetelmiä

	Lyhytmittaristen osioiden analyysi	Vastausfunktioiden teoria (IRT)
Tieteenala	Psykometriikka	Psykometriikka
Menetelmäperhe	Latent structure	Latent structure
Syntyvuosi	1990s–2000s	1952–1968
Kehittäjä	Psychometric tradition; methodological articulation by Smith, McCarthy & Anderson (2000)	Frederic M. Lord (and Allan Birnbaum for the 2PL/3PL models)
Tyyppi	Item selection and evaluation procedure	Probabilistic measurement model
Alkuperäislähde	Smith, G. T., McCarthy, D. M., & Anderson, K. G. (2000). On the sins of short-form development. Psychological Assessment, 12(1), 102–111.	Lord, F. M. & Novick, M. R. (1968). Statistical Theories of Mental Test Scores. Addison-Wesley.
Rinnakkaisnimet	abbreviated scale item analysis, short-scale item evaluation, item screening for short forms, SFIA	IRT, latent trait theory, item characteristic curve theory, modern test theory
Liittyvät	4	5
Tiivistelmä	Short-form item analysis is the systematic psychometric evaluation and selection of items when constructing an abbreviated version of a longer measurement instrument. It applies classical and modern item-analysis criteria — item-total correlations, reliability estimates, and factor structure — to identify the smallest item subset that preserves the original scale's psychometric integrity.	Item response theory models the probability that a respondent answers an item correctly (or endorses it) as a function of the respondent's latent trait level and the item's own statistical properties — difficulty, discrimination, and guessing. Unlike classical test theory, IRT places persons and items on the same scale, yielding measurement that is sample-independent for items and test-independent for persons.