Comparar métodos

	Pesquisa-Ação	Análise de Conteúdo	Teoria Fundamentada
Área	Pesquisa qualitativa	Qualitativo	Pesquisa qualitativa
Família	Process / pipeline	Process / pipeline	Process / pipeline
Ano de origem	1946	Systematised through Krippendorff's methodology work; 4th edition 2018	1967
Autor original	Kurt Lewin; expanded by Kemmis, McTaggart, Reason & Bradbury	Klaus Krippendorff (systematic formulation); roots in early 20th-century communications research	Barney Glaser and Anselm Strauss
Tipo	Method	Qualitative / mixed-method research technique	Method
Fonte seminal	Lewin, K. (1946). Action research and minority problems. Journal of Social Issues, 2(4), 34–46.	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.
Outros nomes	Participatory Action Research, PAR, Collaborative Inquiry	İçerik Analizi, systematic content coding, quantitative content analysis	GT, Grounded Theory Approach
Relacionados	1	5	3
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.	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.