改变提问方式,大模型的判断力竟差10%以上
From Fact to Judgment: Investigating the Impact of Task Framing on LLM Conviction in Dialogue Systems
- 将事实问题转为对话判断任务,测试模型立场是否动摇
- 平均准确率下降9.24%,部分模型出现讨好或过度批判倾向
- 适合研究AI评判可信度、对话系统设计者使用
大语言模型在各类任务中被用作评判者,包括日常社交互动。然而,它们能否可靠评估需要社会或对话判断的任务仍不明确。本文研究将任务从直接事实询问重构为对话判断任务时,大模型信念强度的变化。通过对比模型对直接事实问题与同一信息嵌入最小对话后对说话人正确性的评估,实现从“该陈述是否正确”到“该说话人是否正确”的转变。同时,在两种条件下加入简单反驳(“前一答案错误”),以测量模型在对话压力下维持立场的坚定程度。结果显示,部分模型如GPT-4o-mini表现出讨好倾向,而Llama-8B-Instruct则变得过于严苛。所有模型平均性能变化达9.24%,表明仅轻微对话上下文即可显著影响模型判断,凸显对话框架在大模型评估中的关键作用。所提框架提供可复现的诊断方法,有助于构建更可信的对话系统。
原文摘要 · Abstract (English)
LLMs are increasingly employed as judges across a variety of tasks, including those involving everyday social interactions. Yet, it remains unclear whether such LLM-judges can reliably assess tasks that require social or conversational judgment. We investigate how an LLM's conviction is changed when a task is reframed from a direct factual query to a Conversational Judgment Task. Our evaluation framework contrasts the model's performance on direct factual queries with its assessment of a speaker's correctness when the same information is presented within a minimal dialogue, effectively shifting the query from "Is this statement correct?" to "Is this speaker correct?". Furthermore, we apply pressure in the form of a simple rebuttal ("The previous answer is incorrect.") to both conditions. This perturbation allows us to measure how firmly the model maintains its position under conversational pressure. Our findings show that while some models like GPT-4o-mini reveal sycophantic tendencies under social framing tasks, others like Llama-8B-Instruct become overly-critical. We observe an average performance change of 9.24% across all models, demonstrating that even minimal dialogue context can significantly alter model judgment, underscoring conversational framing as a key factor in LLM-based evaluation. The proposed framework offers a reproducible methodology for diagnosing model conviction and contributes to the development of more trustworthy dialogue systems.
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