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arXiv · 2503.06352

GIN-Graph: A Generative Interpretation Network for Model-Level Explanation of Graph Neural Networks

Xiao Yue·Guangzhi Qu·Lige Gan
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Abstract

One significant challenge of exploiting Graph neural networks (GNNs) in real-life scenarios is that they are always treated as black boxes, therefore leading to the requirement of interpretability. To address this, model-level interpretation methods have been developed to explain what patterns maximize probability of predicting to a certain class. However, existing model-level interpretation methods pose several limitations such as generating invalid explanation graphs and lacking reliability. In this paper, we propose a new Generative Interpretation Network for Model-Level Explanation of Graph Neural Networks (GIN-Graph), to generate reliable and high-quality model-level explanation graphs. The implicit and likelihood-free generative adversarial networks are exploited to construct the explanation graphs which are similar to original graphs, meanwhile maximizing the prediction probability for a certain class by adopting a novel objective function for generator with dynamic loss weight scheme. Experimental results indicate that GIN-Graph can be applied to interpret GNNs trained on a variety of graph datasets and generate high-quality explanation graphs with high stability and reliability.

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Xiao Yue, Guangzhi Qu, Lige Gan. 2025-03-08. GIN-Graph: A Generative Interpretation Network for Model-Level Explanation of Graph Neural Networks. https://arxiv.org/abs/2503.06352

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