In which research method does the researcher participate with the subjects in their own setting while observing what is happening?

A case study focuses on an in-depth investigation of a single individual, group, or event, often relying on multiple sources of data such as interviews or archival records. While the researcher may gather detailed information, they typically do not engage with the subject in their natural setting as a participant, making this approach distinct from field research.

Experiments are structured research methods that manipulate variables to observe effects under controlled conditions. Researchers often isolate participants from their natural environments to ensure that extraneous factors do not influence the results. Therefore, the participant-observer dynamic of field research is not present in experimental designs.

Surveys involve collecting data through questionnaires or interviews without the researcher engaging directly with participants in their natural settings. This method gathers quantifiable data but lacks the depth and contextual richness that comes from observational participation, which is essential in field research.