手法を比較

	記述的現象学	ケーススタディリサーチ（Case Study Research）	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	1970s–1985 (systematised by Giorgi; refined 2009)	1984 (seminal codification)	1967
提唱者	Amedeo Giorgi (adapting Edmund Husserl's transcendental phenomenology)	Robert K. Yin (systematised in Case Study Research, 1984)	Barney Glaser and Anselm Strauss
種類	Qualitative research method	Qualitative research design	Method
原典	Giorgi, A. (2009). The Descriptive Phenomenological Method in Psychology: A Modified Husserlian Approach. Duquesne University Press. ISBN: 978-0820703992	Yin, R.K. (2018). Case Study Research and Applications: Design and Methods (6th ed.). Sage. ISBN: 978-1506336169	Glaser, B. G., & Strauss, A. L. (1967). The discovery of grounded theory: Strategies for qualitative research. Aldine.
別名	Giorgi method, empirical phenomenology, scientific phenomenology, Husserlian descriptive phenomenology	Vaka Çalışması (Case Study), case study design, case study methodology	GT, Grounded Theory Approach
関連	6	5	3
概要	Descriptive Phenomenology, systematised by Amedeo Giorgi at Duquesne University, is a rigorous qualitative method for uncovering the general psychological structure of a lived experience. Drawing directly on Husserl's transcendental phenomenology, Giorgi's four-step procedure — epoché, whole reading, meaning-unit discrimination, and transformation into disciplinary language — produces a stable, replicable description of what makes an experience essentially what it is, without theoretical interpretation or causal explanation.	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.	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.