线性-LLM-SCM:用于线性高斯因果模型系数提取的LLM基准测试
Linear-LLM-SCM: Benchmarking LLMs for Coefficient Elicitation in Linear-Gaussian Causal Models
AI总结:
本文提出线性-LLM-SCM框架,用于评估LLM在连续域中对线性高斯因果模型参数化的表现,揭示了LLM在定量因果推理中的局限性。
摘要:
大型语言模型(LLM)在识别定性因果关系方面显示出潜力,但其在连续域中进行定量因果推理的能力——即估计参数化函数关系的效果大小——仍缺乏深入探索。我们引入了线性-LLM-SCM,这是一个可插拔的基准测试框架,用于评估LLM在给定DAG(有向无环图)时对线性高斯结构因果模型(SCM)参数化的表现。该框架将DAG分解为局部父-子集,并提示LLM为每个节点生成回归风格的结构方程,这些方程被汇总并与其他可用的真实参数进行比较。我们的实验显示,在此类基准测试任务中存在几个挑战,例如某些模型结果中的强随机性以及通过连续域中的虚假边导致的DAG规格错误的易感性。在不同模型中,我们观察到某些设置下的系数估计存在显著差异,并且对结构和语义扰动敏感,这突显了当前LLM作为定量因果参数化工具的局限性。我们还开源了该基准测试框架,使研究人员能够轻松利用他们的DAGs和任何现成的LLM进行评估。
英文摘要:
Large language models (LLMs) have shown potential in identifying qualitative causal relations, but their ability to perform quantitative causal reasoning---estimating effect sizes that parametrize functional relationships---remains underexplored in continuous domains. We introduce Linear-LLM-SCM, a plug-and-play framework for evaluating LLMs on Linear Gaussian structural causal model parametrization when a directed acyclic graph (DAG) is given. The framework decomposes a DAG into local parent-child sets and prompts an LLM to produce a regression-style structural equation per node, which is aggregated and compared against available ground-truth parameters. Our experiments with seven real-world DAGs effect ground truth illustrate limitations of LLMs as quantitative causal parameterizers. Across most models, we observe variability in coefficient estimates and sensitivity to structural perturbations. We open-sourced the framework to further encourage the community to work on studies toward the use of LLM for causal effect elicitation in safety-critical domain, e.g., healthcare.
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