পদ্ধতির তুলনা করুন

	Longitudinal Historical Archival Research	দীর্ঘস্থায়ী গবেষণা
ক্ষেত্র	ক্ষেত্র পদ্ধতি	গবেষণা নকশা
পরিবার	Process / pipeline	Process / pipeline
উদ্ভবের বছর	20th century (formalized in social science methodology by the 1970s–1990s)	Late 19th–early 20th century; methodologically codified through the 20th century
প্রবর্তক	Established practice in historical and social science research traditions	No single originator; foundational methodological treatments by Stuart Menard and Judith Singer & John Willett
ধরন	Qualitative/mixed archival research design	Quantitative (or mixed) observational research design
মৌলিক উৎস	Scott, J. (1990). A Matter of Record: Documentary Sources in Social Research. Polity Press. ISBN: 978-0745602578	Menard, S. (2002). Longitudinal Research (2nd ed.). Sage Publications. ISBN: 978-0761922841
অপর নাম	longitudinal archival study, diachronic archival research, historical longitudinal analysis, archival panel research	longitudinal study, longitudinal design, prospective longitudinal study, repeated-measures observational study
সম্পর্কিত	5	4
সারসংক্ষেপ	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.	Longitudinal research is an observational design in which the same participants, groups, or units are measured repeatedly over an extended period. Rather than capturing a single snapshot, it tracks change, stability, and temporal sequencing of variables — making it the primary non-experimental strategy for studying development, growth, decline, and the unfolding of causal processes across time.