手法を比較

	縦断的ライフヒストリー研究	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	1918 (origins); longitudinal application developed from 1980s onward	1948 (modern disciplinary form); broader roots in 19th-century folklore and anthropology
提唱者	Thomas & Znaniecki (Polish Peasant, 1918–1920); elaborated by Ken Plummer, Daniel Bertaux	Allan Nevins (Columbia University Oral History Project, 1948); earlier roots in folk-life and anthropological fieldwork
種類	Qualitative longitudinal research design	Qualitative research method
原典	Plummer, K. (2001). Documents of Life 2: An Invitation to a Critical Humanism. Sage. ISBN: 978-0761952244	Ritchie, D. A. (2003). Doing Oral History: A Practical Guide (2nd ed.). Oxford University Press. ISBN: 978-0195176957
別名	longitudinal biographical research, life history longitudinal design, repeated life history study, longitudinal oral biography	life history interview, oral testimony, spoken history, oral narrative research
関連	6	6
概要	Longitudinal life history research follows the same participants across multiple points in time, collecting repeated in-depth accounts of how their life stories evolve, how they narrate past events differently over time, and how biography intersects with social change. It combines the interpretive depth of life history methodology with the temporal sensitivity of longitudinal design, capturing both the content of lived experience and its unfolding across the life course.	Oral history is a qualitative research method that collects, preserves, and interprets first-person spoken accounts of past events, experiences, and social processes. By recording in-depth interviews with individuals who witnessed or participated in historical events, oral historians document perspectives that written records often exclude. The method bridges historical scholarship and social science, treating the narrator's memory, subjectivity, and voice as primary evidence rather than as limitations to be corrected.