So sánh phương pháp

	Lý thuyết nền tảng cổ điển theo chiều dọc	Phân tích nội dung định tính 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	2000s–2010s
Người khởi xướng	Barney G. Glaser and Anselm L. Strauss (classic GT); longitudinal extension by later methodologists	Philipp Mayring (foundational QCA); longitudinal extension developed across qualitative health and social research traditions
Loại	Qualitative longitudinal research design	Qualitative analytical method
Công trình gốc	Glaser, B. G., & Strauss, A. L. (1967). The Discovery of Grounded Theory: Strategies for Qualitative Research. Aldine. ISBN: 978-0202302607	Mayring, P. (2000). Qualitative content analysis. Forum: Qualitative Social Research, 1(2), Art. 20.
Tên gọi khác	Longitudinal CGT, Glaserian longitudinal grounded theory, classic GT longitudinal design, longitudinal substantive theory building	LQCA, longitudinal QCA, repeated qualitative content analysis, panel qualitative content analysis
Liên quan	6	3
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 qualitative content analysis (LQCA) applies systematic content analysis to text data gathered from the same participants, settings, or documents at two or more points in time. The method preserves the interpretive rigour of qualitative content analysis while adding an explicit temporal dimension, enabling researchers to track how meanings, experiences, categories, or discourse shift, deepen, or stabilise across time rather than producing a single-point-in-time description.