So sánh phương pháp

	Lý thuyết nền tảng cổ điển theo chiều dọc	Lý thuyết nền tảng theo chiều dọc
Lĩnh vực	Định tính	Định tính
Họ	Process / pipeline	Process / pipeline
Năm ra đời	1967 (classic GT); longitudinal application developed from 1980s onward	1990s–2000s (as a recognized variant of grounded theory)
Người khởi xướng	Barney G. Glaser and Anselm L. Strauss (classic GT); longitudinal extension by later methodologists	Kathy Charmaz and longitudinal qualitative researchers (building on Glaser & Strauss)
Loại	Qualitative longitudinal research design	Qualitative longitudinal research design
Công trình gốc	Glaser, B. G., & Strauss, A. L. (1967). The Discovery of Grounded Theory: Strategies for Qualitative Research. Aldine. ISBN: 978-0202302607	Charmaz, K. (2006). Constructing Grounded Theory: A Practical Guide through Qualitative Analysis. Sage. ISBN: 978-0761973522
Tên gọi khác	Longitudinal CGT, Glaserian longitudinal grounded theory, classic GT longitudinal design, longitudinal substantive theory building	LGT, longitudinal GT, temporal grounded theory, grounded theory longitudinal design
Liên quan	6	5
Tóm tắt	Longitudinal Classic Grounded Theory applies Glaser and Strauss's original discovery-oriented grounded theory method across two or more data collection waves separated by time. The approach tracks how social processes, behaviors, and conceptual categories evolve, allowing the researcher to build a substantive theory that captures change and continuity rather than a single static snapshot of a phenomenon.	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.