Case Study

Analyze the validity of Dr. Aris's conclusions by comparing his study to the case of Anna O. What methodological flaws prevent Dr. Aris from claiming his case study provides empirical evidence for his theory, and how must a researcher distinguish between the illustrative and evidentiary value of such reports?

Case context: Dr. Aris is investigating a treatment for chronic anxiety. He publishes a report on a patient, Sarah, who has a severe fear of heights. Dr. Aris theorizes that this fear stems from a repressed memory of falling off a playground slide as a toddler. During hypnosis, Sarah recalls the playground incident, expresses intense fear and sadness, and subsequently finds her fear of heights completely gone. Dr. Aris concludes that this case study serves as empirical evidence that repressed childhood memories cause phobias and that emotional expression under hypnosis is an effective cure.

Question: Analyze the validity of Dr. Aris's conclusions by comparing his study to the case of Anna O. What methodological flaws prevent Dr. Aris from claiming his case study provides empirical evidence for his theory, and how must a researcher distinguish between the illustrative and evidentiary value of such reports?

Sample answer: Dr. Aris's case study suffers from the same methodological limitations as the case study of Anna O. First, it lacks evidentiary value because it is impossible to verify if the repressed memory actually caused the phobia; the relationship is merely correlational and chronological. Second, the apparent cure under hypnosis cannot be definitively attributed to recalling the trauma. The recovery could be due to history, maturation, therapist expectations, or simple exposure therapy during the session. A researcher must distinguish between illustrative value (how well a case describes or explains a theory's concepts) and evidentiary value (whether the study design can rule out alternative explanations and establish causality). Dr. Aris's report has high illustrative value but zero evidentiary value.

Key points:

  • Contrast the illustrative role of a case study with its lack of evidentiary strength.
  • Identify that correlation or temporal sequence does not equal causation in clinical recovery.
  • List alternative explanations for the patient's recovery (e.g., placebo, exposure, passage of time).
  • Explain that verifying a causal theory requires controlled experimental testing, not individual narratives.

Rubric: Grading criteria: 1. Identifies the parallel limitations between Dr. Aris's study and the Anna O. case study. 2. Explains the impossibility of verifying the causal link between the repressed memory and the phobia. 3. Explains the confounding variables that prevent verifying the cure's cause. 4. Explicitly defines and distinguishes between illustrative and evidentiary value.

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Updated 2026-05-26

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Research Methods in Psychology - 4th American Edition @ KPU

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