arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2310.00570cs.LGcs.AI
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LaPLACE:概率性局部模型无关因果解释

LaPLACE: Probabilistic Local Model-Agnostic Causal Explanations

Sein Minn

AI总结:

针对机器学习模型黑箱缺乏透明度的问题,提出基于马尔可夫毯的LaPLACE模型无关解释器,可自动生成最优特征子集的概率因果解释,性能优于LIME和SHAP,在多场景具备实用价值。

摘要:

机器学习模型在各类应用中取得的出色表现毋庸置疑,但其常被视为黑箱的特性以及决策过程缺乏透明度的问题,引发了人们对其预测可解释性的担忧。为应对这一挑战,研究者们开发了多种为机器学习模型提供解释的方法。本文提出LaPLACE-explainer(LaPLACE解释器),旨在以人类可理解的方式,为所有处理表格数据的分类器提供概率性因果解释。LaPLACE-Explainer组件利用马尔可夫毯(Markov blanket)的概念,自动在相关特征与非相关特征之间建立统计边界。该方法可自动生成最优特征子集,作为预测结果的解释。尤为重要的是,它无需预先设定作为解释的前N个特征的固定数量,提升了方法的灵活性与适应性。通过引入条件概率,该方法可提供概率性因果解释,且在局部准确性和解释特征的一致性方面,优于知名的模型无关解释器LIME和SHAP。研究在多种分类模型上严格验证了LaPLACE的合理性、一致性、局部准确性与适应性。此外,研究通过模拟数据集与真实世界数据集的实验,证明了这些解释的实际效用,涵盖解决信任相关问题,例如评估预测可靠性、辅助模型选择、提升可信度,以及识别分类器中与公平性相关的问题。

英文摘要:

Machine learning models have undeniably achieved impressive performance across a range of applications. However, their often perceived black-box nature, and lack of transparency in decision-making, have raised concerns about understanding their predictions. To tackle this challenge, researchers have developed methods to provide explanations for machine learning models. In this paper, we introduce LaPLACE-explainer, designed to provide probabilistic cause-and-effect explanations for any classifier operating on tabular data, in a human-understandable manner. The LaPLACE-Explainer component leverages the concept of a Markov blanket to establish statistical boundaries between relevant and non-relevant features automatically. This approach results in the automatic generation of optimal feature subsets, serving as explanations for predictions. Importantly, this eliminates the need to predetermine a fixed number N of top features as explanations, enhancing the flexibility and adaptability of our methodology. Through the incorporation of conditional probabilities, our approach offers probabilistic causal explanations and outperforms LIME and SHAP (well-known model-agnostic explainers) in terms of local accuracy and consistency of explained features. LaPLACE's soundness, consistency, local accuracy, and adaptability are rigorously validated across various classification models. Furthermore, we demonstrate the practical utility of these explanations via experiments with both simulated and real-world datasets. This encompasses addressing trust-related issues, such as evaluating prediction reliability, facilitating model selection, enhancing trustworthiness, and identifying fairness-related concerns within classifiers.

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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