So sánh phương pháp

	Phỏng vấn bán cấu trúc	Nghiên cứu tình huống	Dân tộc học
Lĩnh vực	Định tính	Định tính	Định tính
Họ	Process / pipeline	Process / pipeline	Process / pipeline
Năm ra đời	1946 (Merton & Kendall); codified as a standard method through the 1980s–1990s	1984 (seminal codification)	c. 1922 (Malinowski's Argonauts of the Western Pacific)
Người khởi xướng	Robert K. Merton and Patricia Kendall (focused interview, 1946); further systematised by Steinar Kvale	Robert K. Yin (systematised in Case Study Research, 1984)	Bronisław Malinowski (modern ethnography); rooted in 19th-century anthropology
Loại	Qualitative research method	Qualitative research design	Qualitative fieldwork tradition
Công trình gốc	Kvale, S., & Brinkmann, S. (2009). InterViews: Learning the Craft of Qualitative Research Interviewing (2nd ed.). Sage. ISBN: 978-0761925422	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
Tên gọi khác	guided interview, semi-standardized interview, focused interview, SSI	Vaka Çalışması (Case Study), case study design, case study methodology	Etnografi, participant observation, fieldwork, ethnographic research
Liên quan	6	5	5
Tóm tắt	The semi-structured interview is a qualitative data-collection method in which the researcher prepares a set of key questions or topic areas in advance but remains free to probe, follow up, and reorder as the conversation evolves. Unlike structured interviews — which fix every question and sequence — or unstructured interviews — which are entirely open — the semi-structured format balances comparability across participants with the flexibility needed to capture the depth and nuance of individual perspectives. It is the most widely used interview format in social science, health, and education research.	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.