เปรียบเทียบวิธี

	การวิจัยเอกสารโบราณคดีเชิงประวัติศาสตร์ตามช่วงเวลา	ระเบียบวิธีประวัติศาสตร์บอกเล่า
สาขาวิชา	วิธีการภาคสนาม	วิธีการภาคสนาม
ตระกูล	Process / pipeline	Process / pipeline
ปีกำเนิด	20th century (formalized in social science methodology by the 1970s–1990s)	1948 (systematic practice); broader theorisation 1970s–1990s
ผู้ริเริ่ม	Established practice in historical and social science research traditions	Columbia University Oral History Research Office (Allan Nevins); later theorised by Alessandro Portelli and Donald Ritchie
ประเภท	Qualitative/mixed archival research design	Qualitative historical-empirical method
แหล่งต้นตำรับ	Scott, J. (1990). A Matter of Record: Documentary Sources in Social Research. Polity Press. ISBN: 978-0745602578	Ritchie, D. A. (2015). Doing Oral History (3rd ed.). Oxford University Press. ISBN: 978-0199329960
ชื่อเรียกอื่น	longitudinal archival study, diachronic archival research, historical longitudinal analysis, archival panel research	oral history research, life history interviewing, oral testimony research, OHM
ที่เกี่ยวข้อง	5	6
สรุป	Longitudinal historical archival research is a qualitative and documentary method that systematically examines primary archival sources — records, manuscripts, correspondence, institutional files — across multiple points in time to trace change, continuity, or development within a phenomenon over an extended historical period. By imposing a longitudinal dimension on standard archival inquiry, researchers can reconstruct how events, structures, policies, or social conditions evolved rather than capturing only a single historical moment.	The oral history method is a qualitative research approach in which researchers conduct in-depth, recorded interviews with individuals who have direct personal experience of a historical event, social process, or community life. It captures subjective perspectives, memory, and lived experience that written records rarely preserve, making it indispensable for recovering voices absent from official archives — particularly those of marginalised communities, minority groups, and ordinary people.