手法を比較

	比較質的コンテンツ分析（Comparative Qualitative Content Analysis）	比較事例研究
分野	質的手法	質的手法
系統	Process / pipeline	Process / pipeline
提唱年	1983 (Mayring's QCA foundation); comparative adaptations prominent from 2000s onward	1984 (Yin); 1995 (Stake)
提唱者	Philipp Mayring (qualitative content analysis); comparative application developed across communication, policy, and social science research	Robert K. Yin; Robert E. Stake
種類	Qualitative research design and analysis strategy	Qualitative / mixed research design
原典	Schreier, M. (2012). Qualitative Content Analysis in Practice. Sage. ISBN: 978-0857029201	Yin, R. K. (2018). Case Study Research and Applications: Design and Methods (6th ed.). Sage. ISBN: 978-1506336169
別名	comparative QCA, cross-case qualitative content analysis, multi-context qualitative content analysis, comparative interpretive content analysis	cross-case study, multi-site case study, multiple case study design, comparative case analysis
関連	4	4
概要	Comparative qualitative content analysis (comparative QCA) applies a systematic, category-driven reading of texts or documents across two or more cases, groups, time periods, or cultural contexts, with the explicit goal of identifying similarities, differences, and patterns that emerge from the comparison. It combines the interpretive rigour of qualitative content analysis with a structured comparative logic, making it valuable for cross-national policy research, media studies, and any inquiry that requires principled comparison of meaning across contexts.	Comparative case study is a qualitative research design in which two or more bounded cases are studied in depth and then systematically compared to identify similarities, differences, and patterns across contexts. Rooted in Yin's replication logic and Stake's multiple case framework, it is particularly suited to questions that ask how or why a phenomenon unfolds differently — or similarly — across distinct settings, populations, or time periods.