Evaluation Metrics for XAI: A Review, Taxonomy, and Practical Applications

Abstract

Within the past few years, the accuracy of deep learning and machine learning models has been improving significantly while less attention has been paid to their responsibility, explainability, and interpretability. eXplainable Artificial Intelligence (XAI) methods, guidelines, concepts, and strategies offer the possibility of models' evaluation for improving fidelity, faithfulness, and overall explainability. Due to the diversity of data and learning methodologies, there needs to be a clear definition for the validity, reliability, and evaluation metrics of explainability. This article reviews evaluation metrics used for XAI through the PRISMA systematic guideline for a comprehensive and systematic literature review. Based on the results, this study suggests two taxonomy for the evaluation metrics. One taxonomy is based on the applications, and one is based on the evaluation metrics.

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