So sánh phương pháp

	Lý thuyết nền tảng theo chiều dọc	Lý thuyết nền tảng kiến tạo
Lĩnh vực	Định tính	Định tính
Họ	Process / pipeline	Process / pipeline
Năm ra đời	1990s–2000s (as a recognized variant of grounded theory)	2000s (Charmaz 2000–2006; classic GT roots 1967)
Người khởi xướng	Kathy Charmaz and longitudinal qualitative researchers (building on Glaser & Strauss)	Kathy Charmaz (building on Glaser & Strauss, 1967)
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	Charmaz, K. (2006). Constructing Grounded Theory: A Practical Guide Through Qualitative Analysis. Sage. ISBN: 978-0761973539
Tên gọi khác	LGT, longitudinal GT, temporal grounded theory, grounded theory longitudinal design	CGT, constructivist GT, Charmaz grounded theory, interpretive grounded theory
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.	Constructivist Grounded Theory (CGT) is a qualitative methodology developed by Kathy Charmaz that systematically builds mid-range theory from empirical data through iterative coding, memo-writing, and theoretical sampling. Unlike the original objectivist version by Glaser and Strauss, CGT treats both data and theory as co-constructed between researcher and participants, acknowledging the researcher's interpretive perspective as an integral part of the analytic process rather than a source of bias to be eliminated.