পদ্ধতির তুলনা করুন

	Longitudinal Oral History Method	মৌখিক ইতিহাস পদ্ধতি
ক্ষেত্র	ক্ষেত্র পদ্ধতি	ক্ষেত্র পদ্ধতি
পরিবার	Process / pipeline	Process / pipeline
উদ্ভবের বছর	1970s–1980s (systematic formulation); longstanding practice in oral history	1948 (systematic practice); broader theorisation 1970s–1990s
প্রবর্তক	Paul Thompson; developed further by Ken Plummer and oral history practitioners	Columbia University Oral History Research Office (Allan Nevins); later theorised by Alessandro Portelli and Donald Ritchie
ধরন	Qualitative longitudinal research design	Qualitative historical-empirical method
মৌলিক উৎস	Thompson, P. (2000). The Voice of the Past: Oral History (3rd ed.). Oxford University Press. ISBN: 978-0192893468	Ritchie, D. A. (2015). Doing Oral History (3rd ed.). Oxford University Press. ISBN: 978-0199329960
অপর নাম	repeated oral history interviewing, longitudinal life history, serial oral history, longitudinal biographical interviewing	oral history research, life history interviewing, oral testimony research, OHM
সম্পর্কিত	4	6
সারসংক্ষেপ	Longitudinal oral history method is a qualitative research design in which the same participants are interviewed repeatedly over an extended period — months or years — using oral history interviewing techniques. By returning to narrators across time, researchers can trace how personal accounts, identities, and interpretations of experience shift and evolve, capturing the processual and biographical dimensions of social life that a single interview cannot reveal.	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.