手法を比較

	縦断的制度エスノグラフィ	時間的グラウンデッド・セオリー
分野	質的手法	質的手法
系統	Process / pipeline	Process / pipeline
提唱年	1987 (IE foundation); longitudinal applications from 1990s onward	1990s–2000s (as a recognized variant of grounded theory)
提唱者	Dorothy E. Smith (institutional ethnography); longitudinal extension by subsequent IE practitioners	Kathy Charmaz and longitudinal qualitative researchers (building on Glaser & Strauss)
種類	Qualitative longitudinal research design	Qualitative longitudinal research design
原典	Smith, D. E. (2005). Institutional Ethnography: A Sociology for People. AltaMira Press. ISBN: 978-0759106598	Charmaz, K. (2006). Constructing Grounded Theory: A Practical Guide through Qualitative Analysis. Sage. ISBN: 978-0761973522
別名	longitudinal IE, time-extended institutional ethnography, longitudinal IE study, IE longitudinal design	LGT, longitudinal GT, temporal grounded theory, grounded theory longitudinal design
関連	6	5
概要	Longitudinal Institutional Ethnography (longitudinal IE) combines Dorothy Smith's sociology of standpoint — institutional ethnography — with repeated data collection over time to trace how institutional texts, relations, and ruling practices shape people's everyday lives across a temporal span. By revisiting the same participants, settings, or documents at multiple time points, it reveals how institutional coordination evolves, accumulates, or intensifies over weeks, months, or years.	Longitudinal grounded theory is a qualitative research design that applies grounded theory's inductive, iterative logic to data collected from the same participants or settings across multiple time points. It is used to build substantive theory that accounts not only for social processes but also for how those processes unfold, shift, and are renegotiated over time. The approach is particularly suited to studying change, trajectory, and temporal experience in social and health research.