Essay

Explain the fundamental differences between single-subject research and case studies in terms of their methodological approach (qualitative vs. quantitative), their focus of study, and how data is structured and analyzed.

Question: Explain the fundamental differences between single-subject research and case studies in terms of their methodological approach (qualitative vs. quantitative), their focus of study, and how data is structured and analyzed.

Sample answer: Although both single-subject research and case studies focus on a small number of participants, they differ fundamentally. Case studies represent a qualitative approach focused on understanding people's subjective experience through observation, resulting in unstructured data (such as detailed interviews) that is analyzed using narrative techniques. In contrast, single-subject research is a quantitative approach that seeks to understand objective behavior through strict experimental manipulation and control, yielding highly structured data that is analyzed quantitatively.

Key points:

  • Case studies represent a qualitative approach, whereas single-subject research represents a quantitative approach.
  • Case studies focus on understanding subjective experiences, whereas single-subject research focuses on objective behavior.
  • Case studies yield unstructured data analyzed with narrative techniques, whereas single-subject research yields structured data through experimental manipulation/control analyzed quantitatively.

Rubric: Grading is based on the accurate recall of the differences between the two methods. Full credit requires: 1) Correctly identifying case studies as qualitative and single-subject research as quantitative. 2) Explaining that case studies focus on subjective experience while single-subject research focuses on objective behavior. 3) Describing case study data as unstructured (analyzed via narrative techniques) and single-subject data as highly structured (analyzed quantitatively) via experimental control.

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Updated 2026-05-26

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KPU

Research Methods in Psychology - 4th American Edition @ KPU

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