Interpretable and Fair Generalized Additive Neural Networks via Multi-objective Learning

• URL: http://arxiv.org/abs/2609.05946v1
• Date: Sat, 05 Sep 2026 07:29:42 GMT
• Title: Interpretable and Fair Generalized Additive Neural Networks via Multi-objective Learning
• Abstract summary: Interpretability and fairness are two of the most emphasized dimensions in trustworthy artificial intelligence (AI)<n>This paper focuses on neural network (NN)-based generalized additive models (GAMs), a class of self-interpretable models.
• Score: 52.66717986145448
• License: http://creativecommons.org/licenses/by-nc-nd/4.0/
• Abstract: Interpretability and fairness are two of the most emphasized dimensions in trustworthy artificial intelligence (AI). Various explainable AI methods have been introduced to improve interpretability. This paper focuses on neural network (NN)-based generalized additive models (GAMs), a class of self-interpretable models. While most existing research has prioritized improving the accuracy of NN-based GAMs, their interpretability remains largely underexplored. To address this gap, this paper introduces explicit quantitative metrics for evaluating the interpretability of NN-based GAMs, empirically examines their effectiveness, and explores strategies for improving interpretability within these models. In addition, the simultaneous and explicit optimization of both interpretability and fairness, along with their trade-offs and the underlying reasons, remains underexplored. To address this, we propose a multi-objective neural basis model (MONBM) framework based on multi-objective evolutionary learning to consider accuracy, interpretability, and fairness simultaneously. A partial retraining strategy is further developed to facilitate the practical application of evolutionary multi-objective optimization to deep model architectures. Based on MONBM, this paper reveals the complex relationships between these dimensions and the reasons behind these intricate relationships. This analysis demonstrates how multi-objective optimization can be combined with self-interpretable models to reveal relationships among trustworthiness objectives. In addition, MONBM obtains a set of models with different trade-offs between dimensions, and the competitiveness of the approach is validated by comparing it with state-of-the-art methods.

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