手法を比較

	Multiple Case-Based Classic Grounded Theory	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	1967 (foundational); multi-case adaptation developed through 1970s–1990s	1984 (Yin); 1995 (Stake)
提唱者	Barney G. Glaser and Anselm L. Strauss (foundational); Glaser extended for comparative multi-case contexts	Robert K. Yin; Robert E. Stake
種類	Qualitative inductive theory-generation design	Qualitative / mixed research design
原典	Glaser, B. G., & Strauss, A. L. (1967). The Discovery of Grounded Theory: Strategies for Qualitative Research. Aldine. ISBN: 978-0202302607	Yin, R. K. (2018). Case Study Research and Applications: Design and Methods (6th ed.). Sage. ISBN: 978-1506336169
別名	multi-case CGT, classic GT with multiple cases, comparative grounded theory, Glaserian multi-case grounded theory	cross-case study, multi-site case study, multiple case study design, comparative case analysis
関連	6	4
概要	Multiple case-based classic grounded theory (CGT) extends Glaser and Strauss's original inductive framework by grounding theory development simultaneously across two or more purposefully selected cases. Rather than studying a single site or participant group, the researcher treats each case as a distinct analytic unit while using the constant comparative method to draw cross-case theoretical insights. The goal is the same as in all classic GT: emergence of a substantive theory that explains the main concern of participants — but the multi-case structure broadens the conceptual base and supports more robust theoretical abstraction.	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.