Critical Case Study — Strategic Single-Case Research
Critical Case Study Research · Also known as: critical case, strategic case study, critical-instance case study, paradigmatic case study
A critical case study is a case study design in which the researcher deliberately selects a case that is strategically important for testing, confirming, challenging, or extending an existing proposition, theory, or policy claim. Rather than choosing a typical or representative case, the researcher argues that if the finding holds here — in this most-likely, least-likely, or paradigmatic instance — it can reasonably be expected to hold more broadly. This purposive logic transforms a single case into a powerful analytical tool.
Read the full method
Sign in with a free account to read this section.
Method map
The neighbourhood of related methods — select a node to explore.
When to use it
Use critical case study when you need to test, challenge, or extend a theoretical proposition or policy claim, and when you can identify a single case whose strategic position makes the test meaningful — most-likely, least-likely, or paradigmatic. It is particularly valuable in evaluation research, organizational studies, policy analysis, and theory-building phases of a research program. Do not use it when the research question is exploratory with no guiding proposition to test, when the case cannot be justified as strategically critical, or when statistical generalization to a population is required.
Strengths & limitations
- Turns a single case into a theoretically powerful test by virtue of strategic selection logic.
- Enables analytical generalization — confident extension of findings to theory or policy without statistical sampling.
- Demands explicit, auditable justification of case selection, which strengthens rigor and transparency.
- Accommodates rich, multi-source evidence (interviews, documents, observations) to build a robust evidentiary base.
- Well suited to resource-constrained research contexts where only one case is feasible, provided the case is genuinely critical.
- The strength of the design rests entirely on the quality of the case selection argument; a poorly justified case undermines all subsequent findings.
- Findings cannot be generalized statistically; replication across additional critical cases is needed to build cumulative evidence.
- Access to the critical case may be difficult, particularly when the case involves sensitive organizations or events.
- Researchers with strong theoretical priors may unconsciously select cases that confirm rather than genuinely test the proposition.
Frequently asked
What makes a case 'critical' — and how do I justify it?
A case is critical when its outcome provides strong logical leverage over a theoretical or policy proposition. Most-likely cases are settings where a hypothesis should succeed if it is ever true; least-likely cases are settings where it should fail unless it is robustly true; paradigmatic cases embody the phenomenon in its clearest form. Justification requires articulating this logic explicitly before data collection, linking it to prior theory or evidence, and explaining what a positive versus negative finding would imply.
How is critical case study different from a standard single case study?
All critical case studies are single (or small-N) case studies, but not all single case studies are critical. The distinguishing feature is the explicit strategic selection argument: the researcher must demonstrate in advance why this particular case — rather than any other — provides a critical test of a proposition. A standard exploratory or intrinsic case study selects on access, novelty, or bounded context rather than on strategic theoretical leverage.
Can I combine critical case study with qualitative methods such as thematic analysis?
Yes. Critical case study is a research design, not an analytic method. Within the case you can apply thematic analysis, discourse analysis, process tracing, or other qualitative (or mixed) analytic techniques. The case study design governs how you select, bound, and generalize from the case; the analytic method governs how you make sense of the data within it.
How many participants or data sources do I need?
There is no fixed number. The logic is triangulation and saturation within the case rather than sample size. Typically a critical case study draws on multiple informants (often 5–20 key interviews), supplemented by documents, observations, or archival data. The criterion is whether the evidence is sufficient to address the propositions and rule out primary rival explanations — not whether a numeric threshold has been met.
Does 'critical' in critical case study mean critical theory?
No. In this design, 'critical' refers to the strategic selection role the case plays — it is critical for testing a proposition — not to critical theory, critical pedagogy, or emancipatory research traditions. A critical case study can be conducted from any epistemological stance, including positivist, interpretivist, or constructivist orientations.
Sources
- Flyvbjerg, B. (2006). Five misunderstandings about case-study research. Qualitative Inquiry, 12(2), 219–245. DOI: 10.1177/1077800405284363 ↗
- Yin, R. K. (2018). Case Study Research and Applications: Design and Methods (6th ed.). Sage. ISBN: 978-1506336169
How to cite this page
ScholarGate. (2026, June 3). Critical Case Study Research. ScholarGate. https://scholargate.app/en/qualitative/critical-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
- Comparative Case StudyQualitative↔ compare
- Critical Discourse AnalysisQualitative↔ compare
- Critical EthnographyQualitative↔ compare
- Grounded TheoryQualitative Research↔ compare
- Interpretive case studyQualitative↔ compare