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Whose Opinions Do Language Models Reflect?

Written for the Research library (claude-opus-5-5) from the paper text, in our own words: the license "arXiv — non-exclusive license to distribute" does not allow redistributing the text itself. Original — arxiv.org/pdf/2303.17548

Summary

Language models increasingly answer subjective questions that have no correct answer, so any reply, including a refusal, takes a stance. The authors ask which human groups' views these stances match. To measure this, they turn professionally designed public opinion polls into an evaluation resource. The resulting dataset, OpinionQA, contains 1498 multiple-choice questions from Pew Research's American Trends Panel. Each question comes with weighted answer distributions for the overall US population and for 60 demographic groups.

For each question, the model's next-token log probabilities over the answer options are normalized into an opinion distribution and compared with the human distributions. The comparison covers three axes:

  • representativeness: default agreement with groups
  • steerability: whether persona prompts shift answers toward a group
  • consistency: whether group alignment holds across topics

Across nine models, the gap between model and population views is about as large as the gap between Democrats and Republicans on climate change. Human-feedback tuning widens this gap. Persona prompting helps only slightly. The authors present OpinionQA as a diagnostic probe rather than a target to optimize.

Key points

  • Data and models: OpinionQA draws on 15 ATP survey waves, covering topics such as privacy, politics, health, guns and religion. Nine models from OpenAI and AI21 Labs (350M–178B parameters) were evaluated.
  • Shift after human-feedback tuning: Tuned models align more with liberal, highly educated and higher-income respondents. text-davinci-003 often collapses onto a single dominant view, for example giving Joe Biden over 99% approval.
  • Poorly represented groups: All models represent people aged 65+, Mormons and widowed individuals poorly.
  • Steering is limited: Steering prompts (QA, BIO, PORTRAY formats) improve group alignment only modestly and fix none of the representativeness gaps.
  • Inconsistent leanings and scope: Alignment is not stable across topics. Generally liberal text-davinci-002/003 give conservative-leaning answers on religion. Conclusions apply only to the US, and the multiple-choice results may not carry over to open-ended generation.

Our summary of the paper, in our own words — not its text. The work belongs to its authors; read it at the links above.

Fields: Other

Cited by

300 papers of our library cite it (of the 140673 whose bibliographies we read); 7 of them have a page here, 293 not yet.

Cite

The paper itself, not this page. BibTeX from the library's record of the work. DOI 10.48550/arxiv.2303.17548 · arXiv 2303.17548

@misc{santurkar2023whose,
  title = {{Whose Opinions Do Language Models Reflect?}},
  author = {Santurkar, Shibani and Durmus, Esin and Ladhak, Faisal and Lee, Cinoo and Liang, Percy and Hashimoto, Tatsunori},
  year = {2023},
  doi = {10.48550/arxiv.2303.17548},
  eprint = {2303.17548},
  archivePrefix = {arXiv},
  url = {https://doi.org/10.48550/arxiv.2303.17548}
}

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