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arXiv · 2606.21937

Latent Confidence Alignment for LLM Self-Assessment

Ting-Yu Chen·Tingting Yu·Pei-Cing Huang·Chan Hsu·Ming-Yen Lin·Yihuang Kang
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Abstract

Confidence calibration in large language models (LLMs) is commonly evaluated by comparing predicted confidence with observed accuracy. However, such approaches do not model item difficulty, making it difficult to interpret discrepancies and to determine whether model confidence reflects genuine self-assessment or is merely a byproduct of the response generation process. To address this, we adopt a Rasch model-based latent ability framework and a metacognitive perspective, and propose Latent Confidence Alignment Error (LCAE) to measure the consistency between model self-assessment and the latent error probability implied by model ability and item difficulty. We further incorporate item difficulty as an external signal with a reasoning mechanism. Experiments on a medical-domain dataset with 20 models show that the proposed approach improves self-assessment quality without affecting model ability, and reveals an association between reliability and inference cost.

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Ting-Yu Chen, Tingting Yu, Pei-Cing Huang, Chan Hsu, Ming-Yen Lin, Yihuang Kang. 2026-06-20. Latent Confidence Alignment for LLM Self-Assessment. https://arxiv.org/abs/2606.21937

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