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Xinrong Chen

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#machine learning Preprint Sep 2026

PCQC: Privileged Counterfactual Question Credit for Multi-Turn Medical Dialogue

Privileged Counterfactual Question Credit (PCQC), which uses privileged patient information during training to learn from questions never asked, is introduced, which achieves 63.10% mean diagnostic accuracy, outperforming GRPO and ATPO by 4.38 and 4.21 percentage points, respectively.

Chen-Xuan Li, Jia-Yi Wan, Xin-Rong Chen et al. · 0 citations
#natural language process... Preprint Aug 2026

Beyond Information Seeking: Severity-Aware Question Supervision for Proactive Medical Dialogue

Expected-Severity-Risk (ESR) is proposed, a consequence-aware question-supervision objective that values each candidate by its expected reduction in severity-aware terminal risk, and its results support moving proactive medical dialogue beyond uncertainty reduction toward consequence-aware evidence acquisition.

Chen-Xuan Li, Xin-Rong Chen, Lu-Ya Zhang et al. · 0 citations

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