手法を比較

	複数事例に基づくオーラルヒストリー ― 事例間証言研究	複数事例研究
分野	質的手法	質的手法
系統	Process / pipeline	Process / pipeline
提唱年	1970s–1990s (convergence of oral history and case study traditions)	1980s–1990s (Yin's first edition 1984; Stake's collective case study concept 1995)
提唱者	Alessandro Portelli (oral history theory); Robert K. Yin (multiple case logic)	Robert K. Yin (systematic replication logic); Robert E. Stake (naturalistic/collective case tradition)
種類	Qualitative multi-case research design	Qualitative research method
原典	Portelli, A. (1997). The Battle of Valle Giulia: Oral History and the Art of Dialogue. University of Wisconsin Press. ISBN: 978-0299153045	Yin, R. K. (2018). Case Study Research and Applications: Design and Methods (6th ed.). Sage. ISBN: 978-1506336169
別名	multi-case oral history, comparative oral history, cross-case oral history, multi-site oral history	comparative case study, multi-site case study, collective case study, cross-case analysis
関連	6	6
概要	Multiple case-based oral history is a qualitative research design that embeds oral history interviews within a multiple-case framework. Rather than collecting testimonies from a single community or site, the researcher deliberately selects two or more distinct cases — communities, cohorts, organisations, or geographic sites — gathers in-depth oral testimonies within each, and then conducts systematic cross-case comparison to identify both shared and divergent historical experiences.	Multiple-case study design investigates two or more bounded real-world cases using the same research protocol, then compares findings across cases to identify patterns, contrasts, and explanatory insights that a single case could not produce. Developed primarily through Robert Yin's replication logic and Robert Stake's collective case tradition, the approach is particularly powerful when a researcher needs to determine whether a phenomenon occurs under varied conditions or to test an emerging theoretical explanation against rival contexts.