“A research method that engages in the close, detailed examination of a single example or phenomenon. ...Case studies are often published by ethnographers, participant observers and historical researchers. The study of ‘classic’ cases plays a central role in training in some fields, especially anthropology, law and psychoanalysis.” See Calhoun, C. J. (2002).
case study: (a) a process or record of research into the development of a particular person, group, or situation over a period of time; this as a method; (b) a particular instance or case that may be analysed or used as an example to illustrate a thesis or principle. (Oxford English Dictionary, 2017)