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Case Study

Based on the limitations of rationalism, explain why the researcher's logical conclusion failed to align with the empirical reality of their study. What specific element of their rationalist approach was flawed?

Case context: A cognitive researcher uses rationalist deduction to conclude: 'All humans make decisions to optimize happiness, so no human will make a decision that intentionally causes them immediate pain.' Based on this, they hypothesize that no participant will choose a painful stimulus in their study. However, they observe that several participants choose the painful stimulus to help a friend. The researcher is confused because their reasoning seemed perfectly logical.

Question: Based on the limitations of rationalism, explain why the researcher's logical conclusion failed to align with the empirical reality of their study. What specific element of their rationalist approach was flawed?

Sample answer: The researcher's logical conclusion failed because their starting assumption—that all humans only make decisions to optimize happiness and never choose immediate pain—was factually incorrect. In rationalism, a conclusion is only as valid as its starting premises. If a premise is false, the conclusion will also be false, despite the appearance of rationality and logical consistency.

Key points:

  • The researcher's starting premise was factually incorrect.
  • Under rationalism, conclusions are only valid if starting assumptions are true.
  • Logical consistency alone does not guarantee a true conclusion if the premises are false.
  • The study's empirical results contradicted the false conclusion derived from rationalism.

Rubric: Students should explain that the researcher's conclusion failed because the starting premise (that humans never choose immediate pain) was factually incorrect. They must show comprehension that under rationalism, a conclusion is only valid if the starting premises are true, meaning factually incorrect assumptions lead to false conclusions.

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Updated 2026-05-27

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KPU

Research Methods in Psychology - 4th American Edition @ KPU

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