เปรียบเทียบวิธี

	การวิจัยกรณีศึกษา	ชาติพันธุ์วรรณนา	การสังเกตแบบไม่เข้าร่วม
สาขาวิชา	เชิงคุณภาพ	เชิงคุณภาพ	ระเบียบวิธีสำรวจ
ตระกูล	Process / pipeline	Process / pipeline	Process / pipeline
ปีกำเนิด	1984 (seminal codification)	c. 1922 (Malinowski's Argonauts of the Western Pacific)	Formalized mid-20th century (Gold 1958); practice dates to late 19th-century social surveys
ผู้ริเริ่ม	Robert K. Yin (systematised in Case Study Research, 1984)	Bronisław Malinowski (modern ethnography); rooted in 19th-century anthropology	Raymond Gold (role typology); earlier roots in social survey movement and Chicago School sociology
ประเภท	Qualitative research design	Qualitative fieldwork tradition	Qualitative / quantitative observational data collection
แหล่งต้นตำรับ	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	Gold, R. L. (1958). Roles in sociological field observations. Social Forces, 36(3), 217–223.
ชื่อเรียกอื่น	Vaka Çalışması (Case Study), case study design, case study methodology	Etnografi, participant observation, fieldwork, ethnographic research	detached observation, systematic observation, structured field observation, external observation
ที่เกี่ยวข้อง	5	5	5
สรุป	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.	Non-participant observation is a data-collection method in which the researcher observes behavior, interactions, or events in a natural or structured setting without joining or influencing the activity under study. The observer maintains a deliberate distance from participants to minimize their own effect on the phenomena being recorded, producing field notes, behavioral tallies, or recordings that reflect naturally occurring behavior rather than behavior shaped by researcher involvement.