Comparar métodos

	Pesquisa-Ação	Pesquisa de Estudo de Caso	Etnografia
Área	Pesquisa qualitativa	Qualitativo	Qualitativo
Família	Process / pipeline	Process / pipeline	Process / pipeline
Ano de origem	1946	1984 (seminal codification)	c. 1922 (Malinowski's Argonauts of the Western Pacific)
Autor original	Kurt Lewin; expanded by Kemmis, McTaggart, Reason & Bradbury	Robert K. Yin (systematised in Case Study Research, 1984)	Bronisław Malinowski (modern ethnography); rooted in 19th-century anthropology
Tipo	Method	Qualitative research design	Qualitative fieldwork tradition
Fonte seminal	Lewin, K. (1946). Action research and minority problems. Journal of Social Issues, 2(4), 34–46.	Yin, R.K. (2018). Case Study Research and Applications: Design and Methods (6th ed.). Sage. ISBN: 978-1506336169	Hammersley, M. & Atkinson, P. (2019). Ethnography: Principles in Practice (4th ed.). Routledge. ISBN: 978-1138504462
Outros nomes	Participatory Action Research, PAR, Collaborative Inquiry	Vaka Çalışması (Case Study), case study design, case study methodology	Etnografi, participant observation, fieldwork, ethnographic research
Relacionados	1	5	5
Resumo	Action research is a collaborative research methodology in which researchers work with practitioners and community members to investigate a problem, implement change, and evaluate outcomes, cycling through reflection, action, and learning. Developed by Kurt Lewin (1946), action research bridges research and practice, aiming simultaneously to produce knowledge and practical improvement.	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.	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.