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News/When Answer Evaluation Misleads Confidence Selection: Fact-Grounded Form Grading for Open-Ended QA
arxiv
PublishedNovember 4, 2026 at 5:00 AM

When Answer Evaluation Misleads Confidence Selection: Fact-Grounded Form Grading for Open-Ended QA

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arXiv:2608.25654v2 Announce Type: replace Abstract: Many benchmarks now prefer open-ended questions for testing LLM and NLP methods. We find that the choice of a calibration rule can flip when only the correctness labels change: on 141 pilot answers, rules chosen with exact-match labels look 0.239 B

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