手法を比較

	短縮版クロンバックのα	短縮版信頼性分析
分野	心理測定学	心理測定学
系統	Latent structure	Latent structure
提唱年	1951 (alpha); short-form practice codified 1980s–2000s	1990s–2000s
提唱者	L. J. Cronbach (alpha); short-form application formalized across scale-abbreviation literature	Conventional practice; codified notably by Smith, McCarthy & Anderson (2000) and Stanton et al. (2002)
種類	Internal consistency reliability coefficient	Scale development / psychometric evaluation
原典	Smith, G. T., McCarthy, D. M. & Anderson, K. G. (2000). On the sins of short-form development. Psychological Assessment, 12(1), 102–111.	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.
別名	abbreviated scale alpha, brief scale internal consistency, short-scale Cronbach's alpha, reduced-item alpha	abbreviated scale reliability, short-form validation, scale shortening, item reduction reliability
関連	4	6
概要	Short-form Cronbach's alpha quantifies the internal consistency reliability of an abbreviated version of a psychological scale. It applies Cronbach's alpha formula to a reduced item set, verifying that the shortened instrument retains sufficient reliability to support valid score interpretation in research and applied contexts.	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.