Based on the portrayal of Pauling given by the author of this chapter, why do you think Pauling dismissed the negative results of the effects of megadoses of Vitamin C?

Question

BlackTom AI · Accepted Answer

Pauling’s strong prior commitment to vitamin C and his pattern of selective evaluation explain why he dismissed negative findings.

1) Relevant knowledge points and concepts
- Confirmation bias and motivated reasoning: people favor evidence that supports their beliefs and discount contradictory data. 
- Standards of evidence and replication: randomized controlled trials (RCTs) and meta-analyses outweigh anecdotes or small uncontrolled studies. 
- Methodological critique and advocacy: an invested advocate often attacks negative studies’ methods (dose, timing, population) rather than accepting null results. 
- Social and psychological factors: prestige, personal investment, and public identity can reinforce resistance to abandoning a favored hypothesis.

2) Step-by-step reasoning
- Pauling proposed that megadoses of vitamin C had broad therapeutic effects and accumulated supportive anecdotes and selective studies. 
- When rigorous negative trials appeared, he responded by criticizing their design (claiming insufficient dose, wrong formulation, or inappropriate endpoints), arguing the trials did not test his exact hypothesis. 
- He emphasized mechanistic plausibility and selected supportive evidence, minimizing the importance of larger, better-controlled negative studies. 
- Social dynamics (his reputation, public advocacy role) increased his investment in the hypothesis and made concession less likely.

3) Calculations or intermediate steps
- No numerical calculation is required here; the “intermediate steps” are the logical sequence: prior belief → selective attention to confirming data → critique of disconfirming studies’ validity → continued acceptance of the hypothesis.

4) Why the correct answer is correct
- Each of the typical reasons for dismissing negative results—psychological bias, methodological quibbles, selective citation, and personal/professional investment—applies to Pauling. These factors acted together, so the best conclusion is that all the listed reasons are valid explanations.

5) Why other options are incorrect
- If the alternatives were single-factor explanations (e.g., only poor science or only personal bias), each alone is incomplete. Pauling’s behavior is best explained by the combination of biases, methodological disputes, and advocacy; therefore none of the single explanations fully captures the situation.

6) Conclusion
- For these combined reasons, the correct choice is “All of the answers provided are correct,” which matches the provided answer.

Based on the portrayal of Pauling given by the author of this chapter, why do you think Pauling dismissed the negative results of the effects of megadoses of Vitamin C?单项选择题

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