手法を比較

	短縮版一般化可能性理論	短縮版尺度開発
分野	心理測定学	心理測定学
系統	Latent structure	Latent structure
提唱年	1963–1972 (G-theory); short-form extension ongoing from 1980s	1990s–2000s
提唱者	Lee J. Cronbach, Goldine Gleser, Harinder Nanda, Nageswari Rajaratnam	Multiple contributors; foundational critique by Smith, McCarthy & Anderson (2000); practical guidance by Stanton et al. (2002)
種類	Reliability / decision-study framework	Scale development methodology
原典	Brennan, R. L. (2001). Generalizability Theory. Springer. ISBN: 978-0387952826	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	G-theory for abbreviated scales, short-form G-study, abbreviated test generalizability, short-form D-study	scale abbreviation, abbreviated scale development, short-scale construction, item reduction methodology
関連	5	5
概要	Short form generalizability theory applies the G-theory variance-component framework to abbreviated measurement instruments, using G-studies and D-studies to estimate how many items a short scale must retain to achieve a desired reliability and to evaluate the accuracy of decisions made with a condensed instrument.	Short-form scale development is the systematic process of reducing a full-length psychological scale to a smaller subset of items while preserving the construct validity, reliability, and measurement properties of the original instrument. It is widely used when administration burden must be minimised without sacrificing psychometric quality.