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Farzaneh Heidari

farzaneh.heidari@mila.quebec
PhD - Université de Montréal
Supervisor
Guillaume Rabusseau
Co-supervisor
Jian Tang

Publications

Explaining Graph Neural Networks Using Interpretable Local Surrogates
Farzaneh Heidari
Perouz Taslakian
Guillaume Rabusseau
We propose an interpretable local surrogate (ILS) method for understanding the predictions of black-box graph models. Explainability methods… (see more) are commonly employed to gain insights into black-box models and, given the widespread adoption of GNNs in diverse applications, understanding the underlying reasoning behind their decision-making processes becomes crucial. Our ILS method approximates the behavior of a black-box graph model by fitting a simple surrogate model in the local neighborhood of a given input example. Leveraging the interpretability of the surrogate, ILS is able to identify the most relevant nodes contributing to a specific prediction. To efficiently identify these nodes, we utilize group sparse linear models as local surrogates. Through empirical evaluations on explainability benchmarks, our method consistently outperforms state-of-the-art graph explainability methods. This demonstrates the effectiveness of our approach in providing enhanced interpretability for GNN predictions.
2023-01-01
TAG-ML (published)
proceedings.mlr.press