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A case study is an in-depth, detailed examination of a particular case (or cases) within a real-world context. [1] [2] For example, case studies in medicine may focus on an individual patient or ailment; case studies in business might cover a particular firm's strategy or a broader market; similarly, case studies in politics can range from a narrow happening over time like the operations of a ...
A case–control study (also known as case–referent study) is a type of observational study in which two existing groups differing in outcome are identified and compared on the basis of some supposed causal attribute. Case–control studies are often used to identify factors that may contribute to a medical condition by comparing subjects who ...
Case series. A case series (also known as a clinical series) is a type of medical research study that tracks subjects with a known exposure, such as patients who have received a similar treatment, [ 1] or examines their medical records for exposure and outcome. Case series may be consecutive[ 2] or non-consecutive, [ 3] depending on whether all ...
Case studies are generally a single-case design, but can also be a multiple-case design, where replication instead of sampling is the criterion for inclusion. [2] Like other research methodologies within psychology, the case study must produce valid and reliable results in order to be useful for the development of future research.
Robert K. Yin. Robert K. Yin is an American social scientist and President of COSMOS Corporation, known for his work on case study research as well as on qualitative research. [ 1][ 2] Over the years, his work on case study research has been frequently cited.
The case study method exemplifies qualitative researchers' preference for depth, detail, and context. [12] [13] Data triangulation is also a strategy used in qualitative research. [14] Autoethnography, the study of self, is a qualitative research method in which the researcher uses his or her personal experience to understand an issue.
Single-subject design. In design of experiments, single-subject curriculum or single-case research design is a research design most often used in applied fields of psychology, education, and human behaviour in which the subject serves as his/her own control, rather than using another individual/group. Researchers use single-subject design ...
A nested case–control (NCC) study is a variation of a case–control study in which cases and controls are drawn from the population in a fully enumerated cohort. [ 1] Usually, the exposure of interest is only measured among the cases and the selected controls. Thus the nested case–control study is more efficient than the full cohort design.
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