From the 1 of 4 linked papers with an AI index.
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cs.CL2026
Equitable System-Prompt Selection via Constrained Mixed-Strategy GroupDRO
Mengyu Xu, Qiaoxin Yang, Zhihan Liu +4
Large language models are increasingly used for information seeking, yet semantically equivalent questions phrased in different ways can receive answers of considerably different q…
cs.CL2026
Rethinking LLM-Judged Helpfulness as a Pedagogy Signal: A Pre-Registered Audit Across Tutor Models
Shuyi Fan, Boyuan Deng, Mengyu Xu +4
The paper audits whether a general helpfulness rubric can reliably distinguish between answer‑giving and pedagogical guidance in large language model tutoring, finding that helpful…