Cited by 410Artificial Intelligence in Healthcare and EducationMultimodal Machine Learning ApplicationsTopic Modeling

The DOI matches its Crossref record; 84 of the 85 references it cites were found in a registry or an index; 6 of the 20 sources its claims cite were checked for support.

MedAgents: Large Language Models as Collaborators for Zero-shot Medical Reasoning

Open access
Tang, Xiangru, Zou, Anni, Zhang, Zhuosheng, Li, Ziming, Zhao, Yilun, Zhang, Xingyao, Cohan, Arman, Gerstein, Mark·2024·Findings of the Association for Computational Linguistics ACL 2024

Abstract

Large language models (LLMs), despite their remarkable progress across various general domains, encounter significant barriers in medicine and healthcare.This field faces unique challenges such as domain-specific terminologies and reasoning over specialized knowledge.To address these issues, we propose MEDAGENTS, a novel multi-disciplinary collaboration framework for the medical domain.MedAgents leverages LLM-based agents in a role-playing setting that participate in a collaborative multi-round discussion, thereby enhancing LLM proficiency and reasoning capabilities.This training-free framework encompasses five critical steps: gathering domain experts, proposing individual analyses, summarising these analyses into a report, iterating over discussions until a consensus is reached, and ultimately making a decision.Our work focuses on the zeroshot setting, which is applicable in realworld scenarios.Experimental results on nine datasets (MedQA, MedMCQA, PubMedQA, and six subtasks from MMLU) establish that our proposed MEDAGENTS framework excels at mining and harnessing the medical expertise within LLMs, as well as extending its reasoning abilities.Our code can be found at https: //github.com/gersteinlab/MedAgents.① Expert Gathering ② Analysis Proposition ③ Report Summarization ④ Collaborative Consultation ⑤ Decision Making A 66-year-old male with a history of heart attack and recurrent stomach ulcers is experiencing persistent cough and chest pain, and recent CT scans indicate a possible lung tumor.Designing a treatment plan that minimizes risk and maximizes outcomes is the current concern due to his deteriorating health and medical history....... ...... .

Overview

AI snapshot

Written from the paper’s full text.

TL;DR

MedAgents is a training-free, multi-agent role-playing framework for zero-shot medical question answering that simulates multi-disciplinary expert consultation. Across nine medical datasets, it outperforms zero-shot baselines and approaches few-shot chain-of-thought/self-consistency baselines.

Key findings

  • MedAgents achieved 64.1% on MedQA and 59.3% on MedMCQA with GPT-3.5, and 83.7% on MedQA and 74.8% on MedMCQA with GPT-4, outperforming zero-shot baselines and matching or approaching strong few-shot CoT+SC baselines.
  • Ablation on MedQA showed gains from each stage: direct prompting 49.0%, CoT prompting 55.0%, +Analysis 62.0%, +Analysis & Summarization 65.0%, +Analysis & Summarization & Consultation 67.0%.
  • Human error analysis of 40 randomly selected error cases in MedQA and MedMCQA found 77% of errors involved confusion about domain knowledge, while 8% were due to CoT errors.
  • Agent quantity/domain variation mattered: on GPT-3.5, MedAgents with 6 different domains scored 64.1/59.3 on MedQA/MedMCQA, versus 59.2/58.1 with 6 same domains, 57.5/57.3 with 5 same domains, and 55.9/57.0 with 4 same domains.

Methods

  • The framework has five stages: expert gathering, analysis proposition, report summarization, collaborative consultation, and decision making; experts vote and revise a report iteratively until consensus or a maximum attempt threshold.
  • Experiments used GPT-3.5-Turbo and GPT-4 in zero-shot settings on nine datasets: MedQA, MedMCQA, PubMedQA, and six medical MMLU subtasks; 300 examples were randomly sampled per dataset.
  • Generation settings included temperature 1.0 and top_p 1.0; question/option expert numbers were m=5, n=2 except PubMedQA m=4, n=2; maximum consultation attempts t=5; baselines included zero-shot, few-shot, CoT, and self-consistency prompting.

Limitations

  • The paper states that parameterized LLM knowledge may need updating over time, that integrating diverse models at different stages could be explored, and that the framework may have limited applicability in low-resource languages.
  • The paper reports cost and latency: about $1.41 per 100 QA examples and about 40 seconds inference time per example, which the authors acknowledge is more costly than CoT or direct prompting.
  • The text makes evident a domain-knowledge bottleneck: 77% of analyzed errors related to lack or mis-retrieval of domain knowledge, and the domain variation study was conducted on only 20 samples due to manual evaluation.

Model-written summary. Check it against the paper before relying on it.

Integrity signals

Registry

Crossref · 10.18653/v1/2024.findings-acl.33

Cites

84 of 85 references verified0 citation errors · 1 not checkable

Statistics

Nothing to recompute.

Verification

Claims the paper makes

19 Own result · 16 Own interpretation · 4 Partly supported · 3 Sources not found · 2 No basis given · 1 No full text of the sources · 1 Not checked yet · 1 Own method · accuracy not yet measured

Show all 31 claims

  • It may state two separate claims as one. 8
  • Probably not a substantial claim. 6
  • The quote only partly states this claim. 4
16 of 16
  • The paper relies on this without support.

    LLMs contain latent medical expertise that can be elicited through role-playing and multi-agent discussion.

    “Through such design, the expertise implicitly embedded within LLMs, or that the model has encountered during its training, which may not be readily accessible via traditional prompting, is effectively brought to the fore.”
  • The paper relies on this without support.

    The zero-shot setting is applicable in real-world scenarios.

    “Our work focuses on the zeroshot setting, which is applicable in realworld scenarios.”
  • The paper relies on this without support.

    The multi-disciplinary consultation mechanism is common and effective in hospitals.

    “Inspired by the multi-disciplinary consultation mechanism which is common and effective in hospitals, we are thus inspired to apply this mechanism to medical reasoning tasks through LLM-based multi-agent collaboration.”
  • The paper relies on this without support.

    The authors are the first to propose a multi-agent framework within the medical domain.

    “(i) To the best of our knowledge, we are the first to propose a multi-agent framework within the medical domain and explore how multi-agent communication within the medical setting can lead to a consensus decision, adding a novel dimension to the current literature on medical question answering.”
  • The paper relies on this without support.

    A unanimous report generated by iterative expert consultation best represents the collective expert knowledge and reasoning on the given medical problem.

    “Ultimately, after iterative refinement and consultation, a unanimous report is generated that best represents the collective expert knowledge and reasoning on the given medical problem.”
  • The paper relies on this without support.

    The assembled LLM experts possess respective disciplinary backgrounds.

    “The assembled LLM experts, possessing respective disciplinary backgrounds, engage in a discussion over the initial report, voicing agreements and disagreements.”
  • The paper relies on this without support.

    An initial report synthesizing the analyses concisely represents the performed evaluations.

    “An initial report synthesizing these analyses is then prepared to concisely represent the performed evaluations.”
7 of 7

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Self-check

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Each contradiction between two passages listed here was confirmed by an independent check.

1 of 1

Citations

Cites

Research works printed but not linked: 3

  1. Ziwei Ji, Nayeon Lee, Rita Frieske, Tiezheng Yu, Dan Su, Yan Xu, Etsuko Ishii, Ye Jin Bang, Andrea Madotto, and Pascale Fung. 2023. Survey of hallucination in natural language generation. ACM Computing Surveys, 55(12):1-38.
  2. PMLR.
  3. PMLR.

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Metadata

Authors
Tang, X., Zou, A., Zhang, Z., Li, Z., Zhao, Y., Zhang, X., Cohan, A., & Gerstein, M.
Affiliations
Shanghai Jiao Tong University (CN)
Venue
Findings of the Association for Computational Linguistics ACL 2024
Published
2024
Pages
599-621
OpenAlex
W4402670791
Cited by
376
References
33
Citations by year
2026: 156 · 2025: 157 · 2024: 62
FWCI
79.79
Type
conference paper
Language
en
Open access
Licence
cc-by
Locations
  • Findings of the Association for Computational Linguistics: ACL (Findings of ACL) (publishedVersion, cc-by)
  • arXiv (Cornell University) (submittedVersion, cc-by)
  • arXiv (Cornell University) (cc-by)
Topics
  • Health Sciences › Medicine › Health Informatics › Artificial Intelligence in Healthcare and Education
  • Physical Sciences › Computer Science › Computer Vision and Pattern Recognition › Multimodal Machine Learning Applications
  • Physical Sciences › Computer Science › Artificial Intelligence › Topic Modeling
Keywords
large language models, LLM agents, role-playing agents, training-free framework, medical question answering, expert consultation, decision-making

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