The Calibration Gap between Model and Human Confidence in Large Language Models
CoRR(2024)
摘要
For large language models (LLMs) to be trusted by humans they need to be
well-calibrated in the sense that they can accurately assess and communicate
how likely it is that their predictions are correct. Recent work has focused on
the quality of internal LLM confidence assessments, but the question remains of
how well LLMs can communicate this internal model confidence to human users.
This paper explores the disparity between external human confidence in an LLM's
responses and the internal confidence of the model. Through experiments
involving multiple-choice questions, we systematically examine human users'
ability to discern the reliability of LLM outputs. Our study focuses on two key
areas: (1) assessing users' perception of true LLM confidence and (2)
investigating the impact of tailored explanations on this perception. The
research highlights that default explanations from LLMs often lead to user
overestimation of both the model's confidence and its' accuracy. By modifying
the explanations to more accurately reflect the LLM's internal confidence, we
observe a significant shift in user perception, aligning it more closely with
the model's actual confidence levels. This adjustment in explanatory approach
demonstrates potential for enhancing user trust and accuracy in assessing LLM
outputs. The findings underscore the importance of transparent communication of
confidence levels in LLMs, particularly in high-stakes applications where
understanding the reliability of AI-generated information is essential.
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