手法を比較

	順序型探索的因子分析	クロンバックのα（信頼性分析）
分野	心理測定学	統計学
系統	Latent structure	Latent structure
提唱年	1978–1984	1951
提唱者	Bengt Muthén	Lee J. Cronbach
種類	Latent variable / dimension reduction	Reliability / internal consistency coefficient
原典	Flora, D. B. & Curran, P. J. (2004). An empirical evaluation of alternative methods of estimation for confirmatory factor analysis with ordinal data. Psychological Methods, 9(4), 466–491.	Cronbach, L. J. (1951). Coefficient alpha and the internal structure of tests. Psychometrika, 16(3), 297–334.
別名	ordinal factor analysis, polychoric EFA, categorical EFA, EFA for ordinal data	coefficient alpha, alpha reliability, internal consistency reliability, Güvenilirlik Analizi (Cronbach Alpha)
関連	5	4
概要	Ordinal exploratory factor analysis discovers latent factors underlying a set of ordinal items — typically Likert scales — by computing polychoric correlations among the items and then applying a weighted least squares estimator. It avoids the distortions that arise when continuous EFA methods are naively applied to ordered categorical responses.	Cronbach's alpha is a coefficient of internal consistency that quantifies the degree to which a set of items on a scale measures the same underlying construct. Introduced by Lee J. Cronbach in 1951, it remains the most widely reported reliability index in social-science, health, and educational research.