手法を比較

	複数の事例に基づく構成主義的グラウンデッド・セオリー	比較事例研究
分野	質的手法	質的手法
系統	Process / pipeline	Process / pipeline
提唱年	2006 (Charmaz's CGT); multi-case applications prominent from 2010s onward	1984 (Yin); 1995 (Stake)
提唱者	Kathy Charmaz (constructivist grounded theory); multi-case extension developed through methodological elaboration by Charmaz and subsequent scholars	Robert K. Yin; Robert E. Stake
種類	Qualitative research design and analytic approach	Qualitative / mixed research design
原典	Charmaz, K. (2006). Constructing Grounded Theory: A Practical Guide Through Qualitative Analysis. Sage. ISBN: 978-0761973522	Yin, R. K. (2018). Case Study Research and Applications: Design and Methods (6th ed.). Sage. ISBN: 978-1506336169
別名	multi-case CGT, constructivist grounded theory with multiple cases, multiple-site constructivist GT, CGT multiple case design	cross-case study, multi-site case study, multiple case study design, comparative case analysis
関連	6	4
概要	Multiple case-based constructivist grounded theory (CGT) combines Kathy Charmaz's constructivist grounded theory framework with a deliberate multi-case design. The researcher collects and analyzes data from two or more purposively selected cases simultaneously, applying iterative coding, constant comparison, and theoretical sampling across cases to build a grounded theory that accounts for both within-case depth and cross-case variation. The resulting theory is understood as jointly constructed by researcher and participants rather than objectively discovered.	Comparative case study is a qualitative research design in which two or more bounded cases are studied in depth and then systematically compared to identify similarities, differences, and patterns across contexts. Rooted in Yin's replication logic and Stake's multiple case framework, it is particularly suited to questions that ask how or why a phenomenon unfolds differently — or similarly — across distinct settings, populations, or time periods.