เปรียบเทียบวิธี

	วิธีเปรียบเทียบอย่างต่อเนื่อง	การวิจัยกรณีศึกษา	การวิเคราะห์เนื้อหา	ทฤษฎีฐานราก
สาขาวิชา	เชิงคุณภาพ	เชิงคุณภาพ	เชิงคุณภาพ	การวิจัยเชิงคุณภาพ
ตระกูล	Process / pipeline	Process / pipeline	Process / pipeline	Process / pipeline
ปีกำเนิด	1967	1984 (seminal codification)	Systematised through Krippendorff's methodology work; 4th edition 2018	1967
ผู้ริเริ่ม	Barney G. Glaser and Anselm L. Strauss	Robert K. Yin (systematised in Case Study Research, 1984)	Klaus Krippendorff (systematic formulation); roots in early 20th-century communications research	Barney Glaser and Anselm Strauss
ประเภท	Qualitative research method	Qualitative research design	Qualitative / mixed-method research technique	Method
แหล่งต้นตำรับ	Glaser, B. G., & Strauss, A. L. (1967). The Discovery of Grounded Theory: Strategies for Qualitative Research. Aldine.	Yin, R.K. (2018). Case Study Research and Applications: Design and Methods (6th ed.). Sage. ISBN: 978-1506336169	Krippendorff, K. (2018). Content Analysis: An Introduction to Its Methodology (4th ed.). Sage. ISBN: 978-1506395661	Glaser, B. G., & Strauss, A. L. (1967). The discovery of grounded theory: Strategies for qualitative research. Aldine.
ชื่อเรียกอื่น	CCM, constant comparison, constant comparative analysis, comparative constant analysis	Vaka Çalışması (Case Study), case study design, case study methodology	İçerik Analizi, systematic content coding, quantitative content analysis	GT, Grounded Theory Approach
ที่เกี่ยวข้อง	6	5	5	3
สรุป	The Constant Comparative Method (CCM) is a systematic qualitative analysis procedure in which every newly coded incident is immediately compared with all previously coded incidents in the same category. Introduced by Glaser and Strauss in their 1967 grounded theory framework, CCM drives theory development by cycling continuously between data collection and analysis, progressively refining categories until theoretical saturation is reached. Though closely associated with grounded theory, the method has been widely adopted as a stand-alone analytic strategy across qualitative traditions.	Case study research is a qualitative research design that investigates a specific phenomenon, individual, group, organisation, or event in depth within its real-world context. Systematised by Robert K. Yin in 1984, it supports single-case and multiple-case designs and draws on multiple data sources — interviews, observation, documents, and artefacts — to build a rich, contextualised account of a bounded unit.	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.	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.