arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2412.13645cs.AIcs.CL
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论模型先验在现实世界归纳推理中的作用

On the Role of Model Prior in Real-World Inductive Reasoning

University of Rochester(罗切斯特大学)

Zhuo Liu, Ding Yu, Hangfeng He

AI总结:

本研究通过在五个真实任务中评估三种LLM归纳推理策略,发现假设生成主要由模型先验驱动,而非上下文示例,且先验难以被翻转标签覆盖,揭示了模型先验在归纳推理中的主导作用。

摘要:

大型语言模型(LLMs)展现出令人印象深刻的归纳推理能力,使其能够在上下文示例的引导下,生成能有效泛化到新实例的假设。然而,在现实世界的应用中,LLMs的假设生成并非仅由这些示例决定,而是显著受到特定任务的模型先验的影响。尽管模型先验具有关键影响,但模型先验与示例对假设生成的各自贡献尚未得到充分探索。本研究通过在五个现实世界任务中使用三个LLMs系统地评估三种归纳推理策略,从而弥补了这一空白。我们的实证结果表明,假设生成主要由模型的内在先验驱动;移除示例仅导致假设质量及其下游用处的极小损失。进一步分析表明,该结果在不同标签配置的各种标签格式下保持一致,并且先验难以被覆盖,即使在标签翻转的情况下也是如此。这些见解推进了我们对LLMs中假设生成动态机制的理解,并突显了在现实世界归纳推理任务中更好地利用模型先验的潜力。

英文摘要:

Large Language Models (LLMs) show impressive inductive reasoning capabilities, enabling them to generate hypotheses that could generalize effectively to new instances when guided by in-context demonstrations. However, in real-world applications, LLMs' hypothesis generation is not solely determined by these demonstrations but is significantly shaped by task-specific model priors. Despite their critical influence, the distinct contributions of model priors versus demonstrations to hypothesis generation have been underexplored. This study bridges this gap by systematically evaluating three inductive reasoning strategies across five real-world tasks with three LLMs. Our empirical findings reveal that, hypothesis generation is primarily driven by the model's inherent priors; removing demonstrations results in minimal loss of hypothesis quality and downstream usage. Further analysis shows the result is consistent across various label formats with different label configurations, and prior is hard to override, even under flipped labeling. These insights advance our understanding of the dynamics of hypothesis generation in LLMs and highlight the potential for better utilizing model priors in real-world inductive reasoning tasks.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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