arXiv Computation and Language By Danyang Zhao, Sendong Zhao, Yanrui Du, Haochun Wang, Ming Ma, Wenhao Li, Jingbo Wang, Jiatong Liu, Bing Qin

Taking the PULSE of Medical Reasoning: Step-Level Retrieval Timing for Knowledge-Grounded Inference

Read the original on arXiv Computation and Language →

The paper introduces PUlSE, a lightweight probing method that uses a language model’s internal representations to decide when to retrieve external biomedical evidence during medical reasoning. By analyzing inter‑layer volatility, PUlSE identifies erroneous reasoning steps and triggers adaptive retrieval, achieving comparable accuracy to exhaustive retrieval while cutting retrieval calls by 72%. The approach also transfers to an unseen legal domain, suggesting broader applicability.

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