So sánh phương pháp

	Phân tích nội dung theo chiều dọc	Phân tích nội dung
Lĩnh vực	Định tính	Định tính
Họ	Process / pipeline	Process / pipeline
Năm ra đời	Mid-20th century onward; systematized alongside content analysis (Berelson, 1952; Krippendorff, 1980)	Systematised through Krippendorff's methodology work; 4th edition 2018
Người khởi xướng	Developed within the content analysis tradition; longitudinal extensions widely applied since the mid-20th century in communication and political science research	Klaus Krippendorff (systematic formulation); roots in early 20th-century communications research
Loại	Qualitative and mixed-methods research design	Qualitative / mixed-method research technique
Công trình gốc	Krippendorff, K. (2018). Content Analysis: An Introduction to Its Methodology (4th ed.). Sage. ISBN: 978-1506395661	Krippendorff, K. (2018). Content Analysis: An Introduction to Its Methodology (4th ed.). Sage. ISBN: 978-1506395661
Tên gọi khác	LCA, repeated content analysis, diachronic content analysis, trend content analysis	İçerik Analizi, systematic content coding, quantitative content analysis
Liên quan	5	5
Tóm tắt	Longitudinal Content Analysis (LCA) applies systematic content analysis to documents, media, or texts sampled at two or more time points in order to detect how themes, frames, language, or discourse patterns change or persist over time. Drawing on the established logic of content analysis, it adds a temporal dimension that allows researchers to chart trends, trace the evolution of representations, and test hypotheses about historical or social change. It is widely used in communication research, political science, media studies, and the health sciences.	Content analysis is a systematic research technique for reducing text, visual, or media material into coded categories so that patterns can be counted, compared, and interpreted. Formalised by Klaus Krippendorff in his widely cited methodology textbook (latest edition 2018), the method sits at the boundary of qualitative and quantitative inquiry: it imposes structured, replicable coding on inherently meaning-laden material.