Sammenlign metoder

	Eksplorativ faktoranalyse til skalaudvikling (EFA)	Exploratorisk Faktor Analyse (EFA)
Fagområde	Psykometri	Statistik
Familie	Latent structure	Latent structure
Oprindelsesår	1904 (foundational); contemporary scale-development practice from 1990s onward	—
Ophavsperson	Primarily Spearman (1904); psychometric scale application formalised by Thurstone (1930s)	—
Type	Latent variable / dimension reduction	Latent variable / dimension reduction
Oprindelig kilde	Costello, A. B. & Osborne, J. W. (2005). Best practices in exploratory factor analysis: Four recommendations for getting the most from your analysis. Practical Assessment, Research & Evaluation, 10(7), 1–9.	Fabrigar, L. R., Wegener, D. T., MacCallum, R. C. & Strahan, E. J. (1999). Evaluating the use of exploratory factor analysis in psychological research. Psychological Methods, 4(3), 272–299.
Aliasser	Açımlayıcı Faktör Analizi — Ölçek Geliştirme (EFA), psychometric EFA, scale construction factor analysis	common factor analysis, açımlayıcı faktör analizi, factor analysis
Relaterede	5	4
Resumé	Exploratory Factor Analysis for Scale Development is the psychometric application of EFA in which an item pool is administered and the resulting response data are analysed to discover the latent factor structure underlying the items. Originating with Spearman's (1904) factor theory and formalised for applied scale construction by Costello and Osborne (2005) and Fabrigar and colleagues (1999), this variant imposes a stricter sample requirement (n ≥ 100, subject-to-item ratio ≥ 5) and a higher loading threshold (≥ 0.40) than general EFA, and it treats the recovered factor structure as a draft to be subsequently validated by confirmatory analysis.	Exploratory factor analysis reduces a large set of observed variables into a smaller number of latent common factors. It is widely used in scale development and psychometrics to uncover the dimensional structure that underlies a set of correlated items, without specifying that structure in advance.