This paper approaches the case study design as a strategy for research in agricultural and extension education. Case study is defined, throughout the paper, based on three intrinsic characteristics: specificity, intensity, and multiplicity of sources of evidences. A typology is suggested for case studies considering the study’s purpose, the number of cases and the researcher’s interest. The study analyzes some aspects that allow evaluating the methodological consistence of case studies as related to its transferability, the subjectivity in the data collection and analysis processes, and its dependability and credibility.

Keywords: Case Study, Research Methods, Qualitative Research, Triangulation


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