Field-Based Single Case Study — In-Depth Naturalistic Case Investigation
Field-Based Single Case Study Research · Also known as: single-site case study, holistic single case study, naturalistic single case study, field case study
A field-based single case study is a qualitative research design that investigates one bounded real-world case — an individual, program, organization, event, or community — in its natural setting through sustained first-hand fieldwork. Drawing on Robert Yin's systematic case study logic and Robert Stake's interpretive tradition, this design combines multiple data sources collected on-site to build a rich, contextualized account of a phenomenon that cannot be separated from its real-world environment.
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When to use it
Use a field-based single case study when the research question requires deep contextual understanding of a real-world case that cannot be adequately studied from a distance or through self-report alone — for example, how an innovative school program actually operates day-to-day, or how a community responds to a rare event. It is the right design when physical presence in the field will yield data that surveys or remote interviews cannot: tacit practices, spatial dynamics, informal interactions. Choose it over multiple-case designs when access to comparable field sites is limited or when one case is intrinsically significant enough to warrant full analytic attention. Avoid it when the research question is generalizable to a population (use surveys or experiments instead), when on-site access cannot be secured, when time and resource constraints prevent sustained fieldwork, or when the case is so unique that cross-case comparison would be more informative about the phenomenon of interest.
Strengths & limitations
- Maximum depth: full analytic and observational resources concentrate on one case, enabling nuanced contextual understanding unavailable in multi-site designs.
- Ecological validity: data collected in the natural field setting capture real behaviors, practices, and interactions rather than self-reported reconstructions.
- Multi-source triangulation: convergence of observations, interviews, documents, and artifacts strengthens the credibility of findings within the case.
- Well-suited to theory-testing and theory-building: a critical, extreme, or revelatory single case can challenge or extend existing theoretical frameworks in ways that aggregated data cannot.
- Flexible and responsive: the researcher can follow unexpected leads, refine questions during fieldwork, and adjust sampling purposively as understanding deepens.
- Findings are not statistically generalizable to a population; analytic generalization to theory is the appropriate goal.
- Sustained fieldwork demands significant time, researcher effort, and access negotiation that cannot be abbreviated without sacrificing data quality.
- The single-case boundary makes cross-case comparison impossible within the same study; if comparison is the research goal, a multiple-case design is needed.
- Researcher presence may alter the setting (reactivity), and prolonged engagement risks role-boundary blurring between researcher and participant.
- Dependence on a single site means that if access is lost mid-study, the research cannot be easily recovered.
Frequently asked
What makes a case study 'field-based' rather than just a case study?
The field-based label signals that the researcher collects data through direct, in-situ presence at the case site — through observation, participation, and on-site interviewing — rather than relying exclusively on remote interviews, archival documents, or secondary sources. Field presence enables the researcher to observe naturally occurring behavior and context that would be invisible in a purely interview-based or documentary design.
When should I choose a single case over a multiple-case design?
Choose a single case when one site offers exceptional depth, access, or theoretical significance that warrants full attention; when access to comparable field sites is limited; or when the case is intrinsically rare or critical. Choose multiple cases when cross-case comparison is central to the research question, when one case risks appearing idiosyncratic, or when replication logic is needed to strengthen analytic claims.
How do I establish rigor in a field-based single case study?
Yin recommends four quality criteria: construct validity (using multiple data sources and a chain of evidence), internal validity (pattern matching and rival explanation analysis), external validity through analytic generalization to theory, and reliability through a case study protocol and database. Member checking, peer debriefing, and reflexive field note keeping are additional practices that strengthen credibility.
How long should fieldwork last?
Duration depends on the complexity of the case and the phenomena of interest, but a few days of observation is rarely sufficient. Weeks to several months of sustained presence are typical for studies that aim to capture patterns, seasonal or cyclical variation, and the trust needed for candid participant accounts. The key criterion is reaching descriptive sufficiency — the point where extended time in the field would not substantially alter the picture.
Can I combine a field-based single case study with other methods?
Yes. Field-based single case studies are frequently embedded within mixed-methods designs, where quantitative data (e.g., outcome records, surveys of the case population) are integrated with qualitative field evidence to provide a more complete picture. The case study logic governs the qualitative strand, while the mixed-methods design specifies how strands are sequenced and integrated.
Sources
- Yin, R. K. (2018). Case Study Research and Applications: Design and Methods (6th ed.). Sage Publications. ISBN: 978-1506336169
- Stake, R. E. (1995). The Art of Case Study Research. Sage Publications. ISBN: 978-0803957671
How to cite this page
ScholarGate. (2026, June 3). Field-Based Single Case Study Research. ScholarGate. https://scholargate.app/en/qualitative/field-based-single-case-study
Which method?
Set this method beside its closest kin and read them side by side — the library lays the books on the table; the choice is yours.
- Case StudyQualitative↔ compare
- Field-based ethnographyQualitative↔ compare
- Field-based Multiple Case StudyQualitative↔ compare
- Field-based narrative inquiryQualitative↔ compare
- Longitudinal Single Case StudyQualitative↔ compare
- Single-Case StudyQualitative↔ compare