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Beyond Demographics: Aligning Role-playing LLM-based Agents Using Human Belief Networks

How accurately LLM agents imitate human opinions when given demographic information and belief networks.

Research Questions

  1. Do LLM agents align more closely with human behaviour when given only demographic information, or when supplemented with human belief networks?
  2. Can providing a single belief “seed” improve human–LLM alignment across related topics?
  3. How does the structure of belief networks influence the accuracy with which LLMs imitate human viewpoints?

Results

  • Using demographic information alone did not produce meaningful human–LLM alignment.
  • When agents were given a single belief seed, alignment improved substantially for topics connected within the belief network.
  • No improvement was observed for topics outside the belief network.
  • The degree of alignment increased proportionally with the factor loadings within the belief network.

Findings

  • Demographics Are Insufficient:
    • Role-playing based solely on demographic cues failed to align LLM outputs with human beliefs in a meaningful way.
  • Impact of a Belief Seed:
    • LLM agents seeded with a single belief aligned more closely with human responses on related topics.
  • Limited Alignment:
    • On some topics, such as the death penalty, alignment remained at zero even when the correct opinion was given.
  • Structural Dependence:
    • Alignment varied with the strength of the connections in the belief network.
  • Ethical Risks:
    • Because false or harmful beliefs can also be simulated, the approach carries a risk of manipulation.

Scores

  • LLM Models: 5
  • Synthetic Data: 3
  • Method: 4
  • Speed: 1
  • Ethics: 4
  • Accuracy: 4
  • Demographics: 3

If you would like to explore this research in more detail, click here to read the full paper.

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