Sammenlign metoder

	Kortform-itemanalyse	Konfirmatorisk faktoranalyse (CFA)
Fagfelt	Psykometri	Psykometri
Familie	Latent structure	Latent structure
Opprinnelsesår	1990s–2000s	1969
Opphavsperson	Psychometric tradition; methodological articulation by Smith, McCarthy & Anderson (2000)	Karl Gustav Jöreskog
Type	Item selection and evaluation procedure	Hypothesis-testing latent variable model
Opprinnelig kilde	Smith, G. T., McCarthy, D. M., & Anderson, K. G. (2000). On the sins of short-form development. Psychological Assessment, 12(1), 102–111.	Jöreskog, K. G. (1969). A general approach to confirmatory maximum likelihood factor analysis. Psychometrika, 34(2), 183–202.
Alias	abbreviated scale item analysis, short-scale item evaluation, item screening for short forms, SFIA	CFA, confirmatory FA, measurement model, restricted factor analysis
Relaterte	4	4
Sammendrag	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.	Confirmatory factor analysis tests a researcher-specified factor structure against observed data. Unlike exploratory approaches, the researcher decides in advance which indicators load on which latent factor, and the model is evaluated by how closely the implied covariance matrix reproduces the sample covariance matrix. CFA is central to scale validation, construct validity assessment, and measurement invariance testing.