手法を比較

	短縮版項目反応理論（SF-IRT）	項目応答理論（IRT）に基づくコンピュータ適応型テスト（CAT-IRT）
分野	心理測定学	心理測定学
系統	Latent structure	Latent structure
提唱年	1980s–2000s	1970s–1980s
提唱者	Multiple contributors; IRT adapted to short-form contexts from Lord & Novick (1968) and subsequent applied psychometricians	Lord, F. M.; further developed by Wainer, van der Linden, and others
種類	Latent trait / item calibration model	Adaptive measurement / sequential testing
原典	Embretson, S. E. & Reise, S. P. (2000). Item Response Theory for Psychologists. Lawrence Erlbaum Associates. ISBN: 978-0805828191	Wainer, H. (Ed.). (2000). Computerized Adaptive Testing: A Primer (2nd ed.). Lawrence Erlbaum Associates. ISBN: 978-0805835113
別名	SF-IRT, abbreviated scale IRT, short-form calibration, shortened instrument IRT	CAT-IRT, adaptive testing, IRT-based CAT, computerized adaptive testing
関連	6	4
概要	Short-form item response theory applies IRT calibration and scoring to abbreviated or shortened psychological scales. It uses item information functions to guide which items to retain from a full-length instrument, then estimates latent trait scores from the reduced item set while preserving psychometric rigor and linkage to the full-scale metric.	Computerized adaptive testing based on item response theory is a sequential measurement procedure in which a computer algorithm selects successive test items tailored to each examinee's estimated ability level. Drawing on IRT to model item characteristics and ability estimation, CAT delivers precise scores with far fewer items than fixed-length tests, making it efficient for high-stakes assessments, clinical screening, and large-scale surveys.