Can LLMs Generate Novel Research Ideas? A Large-Scale Human Study with 100+ NLP Researchers
Written for the Research library (claude-opus-5-5) from the paper text. Original — arxiv.org/pdf/2409.04109
Summary
Do current LLMs produce research ideas that rival those of human specialists? Earlier agent papers mostly relied on small reviewer pools or LLM-as-a-judge, so this question had no answer. Si, Yang and Hashimoto ran a large controlled experiment with more than 100 NLP researchers. Experts wrote project proposals on prompting-based research. An LLM agent produced proposals on the same matched topics. The agent used retrieval augmentation and generated many candidates, then ranked them. All proposals followed a shared template and passed through an LLM-based style normalizer, so reviewers could not tell the source. Other experts then scored them blind on novelty, excitement, feasibility, expected effectiveness and an overall score.
AI proposals received significantly higher novelty ratings than human ones (p < 0.05). This result held across several statistical tests. Feasibility was rated slightly lower. The authors also found two weaknesses in the agent: its outputs repeat as generation scales up, and it judges its own ideas poorly. The study offers a reusable baseline and protocol for evaluating research agents.
Key points
- Design: 79 expert reviewers blindly assessed 49 ideas in each of three conditions (human, AI, AI reranked by a human), producing nearly 300 reviews on 1–10 scales.
- Novelty scores: Human 4.84, AI 5.64, AI + Human Rerank 5.81. Significance was tested with two-tailed Welch's t-tests and Bonferroni correction.
- Topics: Seven topics were taken from recent NLP calls for papers such as COLM: Bias, Coding, Safety, Multilinguality, Factuality, Math, Uncertainty. Human writers picked a topic, and the LLM idea was matched to it.
- Style control: After normalization, expert judges distinguished AI from human ideas at only about 50% accuracy, i.e., chance level.
- Resources and next steps: The agent code and all review scores are released at github.com/NoviScl/AI-Researcher. A follow-up study is planned in which researchers carry out the ideas as full projects.
Cited by
- Towards Reasoning Era: A Survey of Long Chain-of-Thought for Reasoning Large Language Models
- LLM Dependency Parsing with In-Context Rules
- AlphaEvolve: A coding agent for scientific and algorithmic discovery
- Agent Laboratory: Using LLM Agents as Research Assistants
- The AI Scientist-v2: Workshop-Level Automated Scientific Discovery via Agentic Tree Search
Cite
@misc{si2024can,
title = {{Can LLMs Generate Novel Research Ideas? A Large-Scale Human Study with 100+ NLP Researchers}},
author = {Si, Chenglei and Yang, Diyi and Hashimoto, Tatsunori},
year = {2024},
doi = {10.48550/arxiv.2409.04109},
eprint = {2409.04109},
archivePrefix = {arXiv},
url = {https://doi.org/10.48550/arxiv.2409.04109}
}References
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