So sánh phương pháp

	Phân tích nội dung định lượng cắt ngang	Phân tích nội dung định lượng theo chiều dọc
Lĩnh vực	Thiết kế nghiên cứu	Thiết kế nghiên cứu
Họ	Process / pipeline	Process / pipeline
Năm ra đời	Mid-20th century (formalized 1952–2000s)	1950s onward; longitudinal application widely adopted in media research by the 1970s–1980s
Người khởi xướng	Berelson, B.; Krippendorff, K.; Neuendorf, K. A.	Developed within communication and media studies; codified by Berelson (1952) and extended by Riffe, Lacy, Fico
Loại	Quantitative observational research design	Quantitative observational research design
Công trình gốc	Neuendorf, K. A. (2002). The Content Analysis Guidebook. Sage Publications. ISBN: 978-0761919773	Riffe, D., Lacy, S., Watson, B., & Fico, F. (2019). Analyzing Media Messages: Using Quantitative Content Analysis in Research (4th ed.). Routledge. ISBN: 9781138490536
Tên gọi khác	CS-QCA, cross-sectional content analysis, single-timepoint content analysis, quantitative media content analysis	longitudinal content analysis, repeated-measure content analysis, time-series content analysis, longitudinal QCA
Liên quan	4	5
Tóm tắt	Cross-sectional quantitative content analysis is an observational research design in which a systematically drawn sample of communicative content — news articles, social media posts, advertisements, or other symbolic material — is collected at a single point in time and coded using pre-defined numerical categories to describe or test hypotheses about patterns, frequencies, or associations within that content.	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.