NeurIPS Conference 2025 Conference Paper
Measuring what Matters: Construct Validity in Large Language Model Benchmarks
- Andrew M. Bean
- Ryan Othniel Kearns
- Angelika Romanou
- Franziska Sofia Hafner
- Harry Mayne
- Jan Batzner
- Negar Foroutan Eghlidi
- Chris Schmitz
Evaluating large language models (LLMs) is crucial for both assessing their capabilities and identifying safety or robustness issues prior to deployment. Reliably measuring abstract and complex phenomena such as safety' and robustness' requires strong construct validity, that is, having measures that represent what matters to the phenomenon. With a team of 29 expert reviewers, we conduct a systematic review of 445 LLM benchmarks from leading conferences in natural language processing and machine learning. Across the reviewed articles, we find patterns related to the measured phenomena, tasks, and scoring metrics which undermine the validity of the resulting claims. To address these shortcomings, we provide eight key recommendations and detailed actionable guidance to researchers and practitioners in developing LLM benchmarks.