So sánh phương pháp

	Phân tích nội dung định lượng theo chiều dọc	Phân tích nội dung định lượng
Lĩnh vực	Thiết kế nghiên cứu	Thiết kế nghiên cứu
Họ	Process / pipeline	Process / pipeline
Năm ra đời	1950s onward; longitudinal application widely adopted in media research by the 1970s–1980s	1950s (Berelson 1952; Krippendorff 1980/2004)
Người khởi xướng	Developed within communication and media studies; codified by Berelson (1952) and extended by Riffe, Lacy, Fico	Bernard Berelson; later systematised by Klaus Krippendorff
Loại	Quantitative observational research design	Quantitative observational research method
Công trình gốc	Riffe, D., Lacy, S., Watson, B., & Fico, F. (2019). Analyzing Media Messages: Using Quantitative Content Analysis in Research (4th ed.). Routledge. ISBN: 9781138490536	Krippendorff, K. (2004). Content Analysis: An Introduction to Its Methodology (2nd ed.). Sage. ISBN: 978-0761915454
Tên gọi khác	longitudinal content analysis, repeated-measure content analysis, time-series content analysis, longitudinal QCA	QCA, manifest content analysis, systematic content analysis, frequency-based content analysis
Liên quan	5	4
Tóm tắt	Longitudinal quantitative content analysis systematically codes and counts features of texts, images, or media messages gathered at two or more points in time, enabling researchers to track how content changes, how themes rise or fall in prevalence, and how media or institutional messaging responds to external events. The design merges the structured measurement logic of quantitative content analysis with the temporal tracking power of longitudinal observation.	Quantitative content analysis is a systematic, replicable method for converting the manifest content of text, images, or other recorded communication into numerical data. By applying a pre-specified codebook to a defined corpus and counting or scaling the resulting categories, researchers obtain frequency distributions, proportions, and relationships that can be subjected to standard statistical tests. It is the dominant method for large-scale, objective analysis of media, documents, social media posts, policy texts, and similar materials.