Using feature attributions for post-hoc explanations is a common practice to understand and verify the predictions of opaque machine learning models. Despite the numerous techniques available, individual methods often produce inconsistent and unstable results, putting their overall reliability into question. In this work, we aim to systematically improve the quality of feature attributions by combining multiple explanations across distinct methods or their variations. For this purpose, we propose a novel approach to derive optimal convex combinations of feature attributions that yield provable improvements of desired quality criteria such as robustness or faithfulness to the model behavior. Through extensive experiments involving various model architectures and popular feature attribution techniques, we demonstrate that our combination strategy consistently outperforms individual methods and existing baselines.

该论文旨在通过将不同方法或其变种的多个解释结合起来，系统地提高特征归因的质量，从而改进理解和验证复杂的机器学习模型的预测，该组合策略在多个模型架构和流行的特征归因技术中始终优于个别方法和现有基准。

通过优化特征归因的聚合来提供可证明更好的解释