手法を比較

	オープンコーディング	コンテンツ分析
分野	質的手法	質的手法
系統	Process / pipeline	Process / pipeline
提唱年	1967 (Glaser & Strauss); refined 1990 (Strauss & Corbin)	Systematised through Krippendorff's methodology work; 4th edition 2018
提唱者	Barney G. Glaser & Anselm L. Strauss (classic grounded theory); elaborated by Anselm Strauss & Juliet Corbin	Klaus Krippendorff (systematic formulation); roots in early 20th-century communications research
種類	Qualitative research method	Qualitative / mixed-method research technique
原典	Strauss, A., & Corbin, J. (1998). Basics of Qualitative Research: Techniques and Procedures for Developing Grounded Theory (2nd ed.). Sage. ISBN: 978-0803959408	Krippendorff, K. (2018). Content Analysis: An Introduction to Its Methodology (4th ed.). Sage. ISBN: 978-1506395661
別名	initial coding, open categorisation, substantive coding	İçerik Analizi, systematic content coding, quantitative content analysis
関連	6	5
概要	Open coding is the first, exploratory phase of qualitative data analysis in which raw text — interviews, field notes, or documents — is broken into discrete segments and labelled with short descriptive codes. Developed within grounded theory by Glaser and Strauss and later elaborated by Strauss and Corbin, the procedure is deliberately open and inductive: the analyst reads line-by-line without imposing a predetermined framework, allowing concepts to emerge directly from the data. The resulting codes are then compared and grouped into provisional categories that become the building blocks for subsequent, more selective analysis.	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.