Feature attribution methods attempt to explain neural network predictions by identifying relevant features. However, establishing a cohesive framework for assessing feature attribution remains a challenge. There are several views through which we can evaluate attributions. One principal lens is to observe the effect of perturbing attributed features on the model's behavior (i.e., faithfulness). While providing useful insights, existing faithfulness evaluations suffer from shortcomings that we reveal in this paper. In this work, we propose two new perspectives within the faithfulness paradigm that reveal intuitive properties: soundness and completeness. Soundness assesses the degree to which attributed features are truly predictive features, while completeness examines how well the resulting attribution reveals all the predictive features. The two perspectives are based on a firm mathematical foundation and provide quantitative metrics that are computable through efficient algorithms. We apply these metrics to mainstream attribution methods, offering a novel lens through which to analyze and compare feature attribution methods.

特征归因方法通过识别相关特征来解释神经网络的预测结果，本研究在“忠实度”范式内提出了两个新视角：可靠性和完备性，分别评估特征是否真正预测，以及归因结果是否完整，并基于数学基础提供可计算的定量度量，将这些指标应用于主流归因方法，为分析和比较特征归因方法提供了新视角。

评估特征归因方法的双重视角方法