Comparer des méthodes

	Étude de cas unique longitudinale	Ethnographie
Domaine	Qualitatif	Qualitatif
Famille	Process / pipeline	Process / pipeline
Année d'origine	1984 (Yin's foundational codification); longitudinal case methods in use since early 20th century	c. 1922 (Malinowski's Argonauts of the Western Pacific)
Auteur d'origine	Robert K. Yin (systematic codification); roots in clinical and anthropological case tradition	Bronisław Malinowski (modern ethnography); rooted in 19th-century anthropology
Type	Qualitative research design	Qualitative fieldwork tradition
Source fondatrice	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
Alias	single-case longitudinal design, in-depth longitudinal case study, idiographic longitudinal study, LSCS	Etnografi, participant observation, fieldwork, ethnographic research
Apparentées	6	5
Résumé	A longitudinal single case study is a qualitative research design that follows one bounded unit — a person, organization, program, or community — through multiple points in time. Unlike a cross-sectional snapshot, it captures how phenomena develop, shift, or respond to events across months or years, combining the contextual richness of case study methodology with the temporal depth needed to understand process and change.	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.