手法を比較

	コンテンツ分析	エスノグラフィー	Grounded Theory
分野	質的手法	質的手法	質的研究
系統	Process / pipeline	Process / pipeline	Process / pipeline
提唱年	Systematised through Krippendorff's methodology work; 4th edition 2018	c. 1922 (Malinowski's Argonauts of the Western Pacific)	1967
提唱者	Klaus Krippendorff (systematic formulation); roots in early 20th-century communications research	Bronisław Malinowski (modern ethnography); rooted in 19th-century anthropology	Barney Glaser and Anselm Strauss
種類	Qualitative / mixed-method research technique	Qualitative fieldwork tradition	Method
原典	Krippendorff, K. (2018). Content Analysis: An Introduction to Its Methodology (4th ed.). Sage. ISBN: 978-1506395661	Hammersley, M. & Atkinson, P. (2019). Ethnography: Principles in Practice (4th ed.). Routledge. ISBN: 978-1138504462	Glaser, B. G., & Strauss, A. L. (1967). The discovery of grounded theory: Strategies for qualitative research. Aldine.
別名	İçerik Analizi, systematic content coding, quantitative content analysis	Etnografi, participant observation, fieldwork, ethnographic research	GT, Grounded Theory Approach
関連	5	5	3
概要	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.	Ethnography is a qualitative research tradition in which a researcher immerses themselves in a social group or community over an extended period — typically three to six months or longer — to study its culture, values, and behaviours in their natural setting. Originating in social and cultural anthropology, and consolidated as a rigorous method by Bronisław Malinowski in the early twentieth century, ethnography produces rich, contextualised accounts of how people live, work, and make meaning together.	Grounded Theory (GT) is a systematic qualitative research methodology in which theory emerges directly from data through iterative analysis, rather than being imposed before data collection. Developed by Barney Glaser and Anselm Strauss in 1967, GT prioritizes generating explanatory frameworks grounded in evidence.