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arXiv 2602.16698cs.LG
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因果性是可解释性主张泛化的关键

Causality is Key for Interpretability Claims to Generalise

Mila - Qu\'ebec AI Institute \& Universit\'e de Montr\'eal;Boston University;Cold Spring Harbor Laboratory;Max-Planck-Institute for Intelligent Systems, ELLIS Institute T\"ubingen, University of T\"ubingen

Shruti Joshi, Aaron Mueller, David Klindt, Wieland Brendel, Patrik Reizinger, Dhanya Sridhar

AI总结:

本文探讨了大语言模型可解释性研究中因果推理的重要性,提出通过因果表示学习框架,明确可解释性研究的因果层级,以指导方法选择和评估,确保研究结果的泛化能力。

摘要:

针对大语言模型可解释性研究中普遍存在的泛化不足和因果解释缺乏证据的问题,本文强调因果推断在定义模型激活到不变高层结构的映射、所需数据或假设以及支持的推断方面的作用。通过 Pearl 的因果层级,本文澄清了可解释性研究能支持哪些结论。观察建立了模型行为与内部组件之间的关联,干预(如消融或激活修补)支持这些编辑如何影响行为指标(如平均词概率变化)的主张。然而,反事实主张——即在未观察干预下相同提示的模型输出——在缺乏受控监督的情况下难以验证。本文展示了因果表示学习(CRL)如何操作化这一层级,明确哪些变量可以从激活中恢复以及在何种假设下。这些内容共同推动了一种诊断框架,帮助从业者选择与主张相匹配的方法和评估,以确保研究结果的泛化。

英文摘要:

Interpretability research on large language models (LLMs) has yielded important insights into model behaviour, yet recurring pitfalls persist: findings that do not generalise, and causal interpretations that outrun the evidence. Our position is that causal inference specifies what constitutes a valid mapping from model activations to invariant high-level structures, the data or assumptions needed to achieve it, and the inferences it can support. Specifically, Pearl's causal hierarchy clarifies what an interpretability study can justify. Observations establish associations between model behaviour and internal components. Interventions (e.g., ablations or activation patching) support claims how these edits affect a behavioural metric (e.g., average change in token probabilities) over a set of prompts. However, counterfactual claims -- i.e., asking what the model output would have been for the same prompt under an unobserved intervention -- remain largely unverifiable without controlled supervision. We show how causal representation learning (CRL) operationalises this hierarchy, specifying which variables are recoverable from activations and under what assumptions. Together, these motivate a diagnostic framework that helps practitioners select methods and evaluations matching claims to evidence such that findings generalise.

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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