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Based on the methodological limitations of case studies, explain why this researcher's claims of treatment effectiveness and theoretical support are invalid. Address internal validity, external validity, and researcher bias in your response.
Case context: A researcher publishes a detailed report on an individual who recovered from severe, chronic anxiety after undergoing a unique mindfulness training program. Based on this outcome, the researcher claims that the mindfulness program is an effective treatment for anxiety and uses the case to support a new theory of mindfulness-based neural recovery.
Question: Based on the methodological limitations of case studies, explain why this researcher's claims of treatment effectiveness and theoretical support are invalid. Address internal validity, external validity, and researcher bias in your response.
Sample answer: The researcher's claims are invalid due to three major limitations. First, the study lacks experimental controls, which compromises internal validity; thus, we cannot rule out alternative explanations or prove that the mindfulness program caused the recovery. Second, because the study focuses on a single individual, it has poor external validity, meaning the recovery cannot be generalized to the broader population of individuals with anxiety. Finally, the analysis is highly susceptible to researcher bias, as the researcher's theoretical interest in mindfulness-based neural recovery may have subjectively influenced how the case was described and interpreted.
Key points:
- The lack of experimental controls prevents ruling out alternative explanations, meaning causation cannot be determined.
- Focusing on a single individual results in poor external validity, making generalization to the broader population impossible.
- The subjective nature of the analysis allows the researcher's theoretical views on mindfulness to bias the case description.
- A case study should not be used as empirical evidence to support the new treatment theory.
Rubric: A successful response must apply the concept of case study limitations to the scenario by explaining: 1) low internal validity prevents establishing a causal link between mindfulness and recovery, 2) poor external validity prevents generalizing the findings beyond the single individual, and 3) researcher bias may have subjectively colored the case description to support the pre-existing theory.
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Research Methods in Psychology - 4th American Edition @ KPU
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