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	縦断的オーラルヒストリー
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)	1970s–1990s (formalized as distinct variant)
提唱者	Alessandro Portelli (oral history theory); Robert K. Yin (multiple case logic)	Allan Nevins (oral history); longitudinal variant developed across life-course sociology and oral history practice from 1970s–1990s
種類	Qualitative multi-case research design	Qualitative longitudinal research design
原典	Portelli, A. (1997). The Battle of Valle Giulia: Oral History and the Art of Dialogue. University of Wisconsin Press. ISBN: 978-0299153045	Thomson, A. (2007). Four paradigm transformations in oral history. The Oral History Review, 34(1), 49–70.
別名	multi-case oral history, comparative oral history, cross-case oral history, multi-site oral history	repeated oral history, serial oral history, life-course oral history, longitudinal life narrative
関連	6	4
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.	Longitudinal oral history is a qualitative research design in which the same participants are interviewed repeatedly over an extended period — months or years — using open-ended, narrative-focused conversations. By revisiting participants at multiple points in time, the researcher traces how individuals construct, revise, and reinterpret their personal stories as their lives unfold, capturing not just retrospective accounts but the dynamic, evolving nature of memory and meaning-making.