Cited by 1,118Topic ModelingNatural Language Processing TechniquesMultimodal Machine Learning Applications

The DOI matches its Crossref record; 37 of the 38 references it cites were found in a registry or an index; 6 of the 14 sources its claims cite were checked for support.

Encouraging Divergent Thinking in Large Language Models through Multi-Agent Debate

Open access
Liang, Tian, He, Zhiwei, Jiao, Wenxiang, Wang, Xing, Wang, Yan, Wang, Rui, Yang, Yujiu, Shi, Shuming, Tu, Zhaopeng·2024·Proceedings of the 2024 Conference on Empirical Methods in Natural Language Processing

Abstract

Modern large language models (LLMs) like ChatGPT have shown remarkable performance on general language tasks but still struggle on complex reasoning tasks, which drives the research on cognitive behaviors of LLMs to explore human-like problem-solving strategies.Along this direction, one representative strategy is self-reflection, which asks an LLM to refine the solution with the feedback generated by itself iteratively.However, our study shows that such reflection-style methods suffer from the Degeneration-of-Thought (DoT) problem: once the LLM has established confidence in its solutions, it is unable to generate novel thoughts later through reflection even if its initial stance is incorrect.To address the DoT problem, we propose a Multi-Agent Debate (MAD) framework, in which multiple agents express their arguments in the state of "tit for tat" and a judge manages the debate process to obtain a final solution.Clearly, our MAD framework encourages divergent thinking in LLMs which would be helpful for tasks that require deep levels of contemplation.Experiment results on two challenging datasets, commonsense machine translation and counterintuitive arithmetic reasoning, demonstrate the effectiveness of our MAD framework.Extensive analyses suggest that the adaptive break of debate and the modest level of "tit for tat" state are required for MAD to obtain good performance.Moreover, we find that LLMs might not be a fair judge if different LLMs are used for agents.Code is available at https://github. com/Skytliang/Multi-Agents-Debate.

Overview

AI snapshot

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TL;DR

The paper identifies a Degeneration-of-Thought (DoT) problem in LLM self-reflection, where models stick to incorrect initial answers, and proposes Multi-Agent Debate (MAD) with debaters and a judge to encourage divergent thinking. MAD improves over self-reflection and other baselines on commonsense machine translation and counter-intuitive arithmetic reasoning, though it adds inference cost and depends on debate design choices.

Key findings

  • On Common MT, GPT-3.5-Turbo with MAD surpasses GPT-4 on automatic and human metrics: lexical COMET 82.0 vs. 82.0, BLEURT 70.9 vs. 70.1, HUMAN 3.78 vs. 3.41; contextless COMET 84.8 vs. 84.7, BLEURT 73.7 vs. 73.6, HUMAN 3.67 vs. 3.63; contextual COMET 85.3 vs. 85.0, BLEURT 74.0 vs. 73.7, HUMAN 3.67 vs. 3.65.
  • On Counter-Intuitive AR, MAD with GPT-3.5-Turbo reaches 37.0% accuracy, outperforming GPT-3.5-Turbo (26.0), CoT (28.0), Self-Consistency (29.5), and Self-Reflect (27.5), but not GPT-4 (51.0).
  • MAD mitigates DoT relative to Self-Reflect: bias decreases from 29.0 to 24.8, and diversity increases from 19.3 to 49.7.
  • Analyses show adaptive break and a modest “tit for tat” level are needed for good performance; increasing debaters from 2 to 3 to 4 reduces Common MT performance (COMET 84.4 → 83.1 → 82.9; HUMAN 3.69 → 3.58 → 3.49), and LLM judges may favor the side sharing their backbone LLM.

Methods

  • MAD uses multiple debaters who argue in a fixed order under “tit for tat” meta prompts, plus a judge with discriminative mode to stop adaptively or extractive mode to produce a final answer; experiments set a maximum of 3 debate iterations.
  • Tasks: Commonsense Machine Translation (Chinese→English; 200 lexical, 450 contextless syntactic, 350 contextual syntactic examples) and Counter-Intuitive Arithmetic Reasoning (200 questions). Backbones include vicuna-7b-v1.5-16k, vicuna-13b-v1.5-16k, GPT-3.5-Turbo-0301, and GPT-4-0314; zero-shot with temperature 0.
  • Metrics: COMET, BLEURT, and human 1–5 scores for Common MT; accuracy for Counter-Intuitive AR. Baselines include Self-Reflect, Rerank, MAPS, CoT, and Self-Consistency.

Limitations

  • Stated: MAD requires more time cost because agents engage in multiple rounds; current LLM-based agents may struggle with coherence and relevance in long contexts; LLM-based judges may prefer outputs generated by themselves, so the paper recommends using the same LLM for all roles or distinct LLMs for judge and debaters.
  • Evident from the text: scaling to more debaters reduced performance, which the authors attribute to LLMs’ limitations in handling long texts and judges’ difficulty extracting information from longer debates.
  • Evident from the text: the main results are reported without variance, confidence intervals, or significance tests.

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Crossref · 10.18653/v1/2024.emnlp-main.992

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Citations

Cites

Show all 14 references

Research works printed but not linked: 3

  1. Xavier Garcia, Yamini Bansal, Colin Cherry, George Foster, Maxim Krikun, Melvin Johnson, and Orhan Firat. 2023. The unreasonable effectiveness of few- shot learning for machine translation. In Inter- national Conference on Machine Learning, pages 10867-10878.
  2. PMLR.
  3. Zhiwei He, Tian Liang, Wenxiang Jiao, Zhuosheng Zhang, Yujiu Yang, Rui Wang, Zhaopeng Tu, Shum- ing Shi, and Xing Wang. 2024. Exploring human- like translation strategy with large language models. Transactions of the Association for Computational Linguistics, 12:229-246.

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Metadata

Authors
Liang, T., He, Z., Jiao, W., Wang, X., Wang, Y., Wang, R., Yang, Y., Shi, S., & Tu, Z.
Affiliations
  • Shanghai Jiao Tong University (CN)
  • Tencent (China) (CN)
  • Tsinghua University (CN)
Venue
Proceedings of the 2024 Conference on Empirical Methods in Natural Language Processing
Published
2024
Pages
17889-17904
OpenAlex
W4404782209
Cited by
1,062
References
14
Citations by year
2026: 473 · 2025: 405 · 2024: 155
FWCI
162.44
Type
conference paper
Language
en
Open access
Licence
cc-by
Locations
  • Conference on Empirical Methods in Natural Language Processing (EMNLP) (publishedVersion, cc-by)
  • arXiv (Cornell University) (submittedVersion)
  • arXiv (Cornell University)
Topics
  • Physical Sciences › Computer Science › Artificial Intelligence › Topic Modeling
  • Physical Sciences › Computer Science › Artificial Intelligence › Natural Language Processing Techniques
  • Physical Sciences › Computer Science › Computer Vision and Pattern Recognition › Multimodal Machine Learning Applications
Keywords
large language models, multi-agent debate, divergent thinking, self-reflection, tit-for-tat, LLM-as-a-judge

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