arXiv:2411.00846cs.LGstat.ML2024-11中稿 · publication at 8th…被引 3

提出新方法AEC,让AI解释更准确应对特征相关性问题

Explainable Artificial Intelligence for Dependent Features: Additive Effects of Collinearity

  • 将多变量模型拆解为多个单变量模型,分析特征间相互影响
  • 在模拟与真实数据上验证,AEC比现有方法更抗共线性干扰
  • 适合需要可信解释的医疗、金融等高风险领域应用

可解释人工智能(XAI)旨在揭示机器学习模型内部机制及特征对预测结果的影响。共线性是当前XAI方法在识别关键特征时面临的主要挑战之一。现有方法假设特征相互独立,孤立计算每个特征的影响,但这一假设在实际应用中不成立。本文提出一种新的XAI方法——共线性加性效应(AEC),通过将多变量模型分解为多个单变量模型,以考察特征间的相互作用及其对输出的影响。该方法在模拟数据和真实数据上进行了验证,结果表明,AEC在解释人工智能模型时,相比现有先进方法,对共线性的干扰更具鲁棒性和稳定性。

原文摘要 · Abstract (English)

Explainable Artificial Intelligence (XAI) emerged to reveal the internal mechanism of machine learning models and how the features affect the prediction outcome. Collinearity is one of the big issues that XAI methods face when identifying the most informative features in the model. Current XAI approaches assume the features in the models are independent and calculate the effect of each feature toward model prediction independently from the rest of the features. However, such assumption is not realistic in real life applications. We propose an Additive Effects of Collinearity (AEC) as a novel XAI method that aim to considers the collinearity issue when it models the effect of each feature in the model on the outcome. AEC is based on the idea of dividing multivariate models into several univariate models in order to examine their impact on each other and consequently on the outcome. The proposed method is implemented using simulated and real data to validate its efficiency comparing with the a state of arts XAI method. The results indicate that AEC is more robust and stable against the impact of collinearity when it explains AI models compared with the state of arts XAI method.

可解释AI共线性特征重要性

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