So sánh phương pháp

	Lý thuyết nền tảng theo chiều dọc	Lý thuyết nền tảng cổ điển
Lĩnh vực	Định tính	Định tính
Họ	Process / pipeline	Process / pipeline
Năm ra đời	1990s–2000s (as a recognized variant of grounded theory)	1967
Người khởi xướng	Kathy Charmaz and longitudinal qualitative researchers (building on Glaser & Strauss)	Barney G. Glaser and Anselm L. Strauss
Loại	Qualitative longitudinal research design	Qualitative research method
Công trình gốc	Charmaz, K. (2006). Constructing Grounded Theory: A Practical Guide through Qualitative Analysis. Sage. ISBN: 978-0761973522	Glaser, B. G., & Strauss, A. L. (1967). The Discovery of Grounded Theory: Strategies for Qualitative Research. Aldine.
Tên gọi khác	LGT, longitudinal GT, temporal grounded theory, grounded theory longitudinal design	Glaserian GT, CGT, original grounded theory, classic GT
Liên quan	5	6
Tóm tắt	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.	Classic Grounded Theory (CGT) is a systematic qualitative methodology for generating substantive theory from empirical data. Developed by Barney Glaser and Anselm Strauss in 1967, it uses iterative cycles of data collection, constant comparison, and memo writing to produce a core category and surrounding conceptual framework that explains a social or psychological process. Unlike its later variants, Glaserian CGT insists on emergence — theory must arise from data without forcing preconceived frameworks.