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Do Reasoning Representations Help Humans Evaluate LLM Outputs?

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TL;DR - A controlled human study finds that reasoning formats users prefer are not necessarily the ones that best help them evaluate LLM outputs. Simple chain-of-thought traces outperform planning- and decomposition-based formats for verification, trust calibration, and interpretability.

  • The study compares six reasoning formats across tasks of varying complexity using randomized domains, problem instances, and presentation order.
  • Participants favored planning- and decomposition-based representations, despite simpler chain-of-thought traces better supporting error detection and evaluation.
  • Preferred formats produced calibration risks, including more false alarms on correct traces.
  • Participants sometimes reported high trust while remaining unwilling to verify the reasoning themselves.

Sources (1)

Do Reasoning Representations Help Humans Evaluate LLM Outputs?

arXiv cs.LG Jaewoo Lim, Sungbok Shin, Sanghyun Hong 2026-09-08 arXiv:2609.09038
Public signals Semantic Scholar citations 0 · Semantic Scholar influential citations 0
Providers: Hugging Face · N/A OpenAlex · N/A Publisher · N/A Semantic Scholar · Citations 0 · Influential citations 0 X · N/A Fetched 2026-09-14 14:10:07.947493 UTC

TL;DR - A controlled human study finds that reasoning formats users prefer are not necessarily the ones that best help them evaluate LLM outputs. Simple chain-of-thought traces outperform planning- and decomposition-based formats for verification, trust calibration, and interpretability.

  • The study compares six reasoning formats across tasks of varying complexity using randomized domains, problem instances, and presentation order.
  • Participants favored planning- and decomposition-based representations, despite simpler chain-of-thought traces better supporting error detection and evaluation.
  • Preferred formats produced calibration risks, including more false alarms on correct traces.
  • Participants sometimes reported high trust while remaining unwilling to verify the reasoning themselves.
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