方法对比

	比较内容分析	纵向内容分析
领域	质性	质性
方法族	Process / pipeline	Process / pipeline
起源年份	1952 (Berelson); comparative application developed through 1970s–2000s	Mid-20th century onward; systematized alongside content analysis (Berelson, 1952; Krippendorff, 1980)
提出者	Bernard Berelson (foundational content analysis); Klaus Krippendorff (systematic methodology)	Developed within the content analysis tradition; longitudinal extensions widely applied since the mid-20th century in communication and political science research
类型	Qualitative and/or quantitative comparative research design	Qualitative and mixed-methods research design
开创性文献	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
别名	cross-case content analysis, comparative textual analysis, CCA, comparative message analysis	LCA, repeated content analysis, diachronic content analysis, trend content analysis
相关	5	5
摘要	Comparative Content Analysis applies a shared coding framework to texts, documents, or media artifacts drawn from two or more groups, contexts, time points, or nations in order to identify similarities, differences, and patterns across those units of comparison. By holding the analytical lens constant while varying the comparison unit, it reveals how meaning, framing, or discourse differs across the cases under study.	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.