arXiv:2510.23469cs.LG2025-10

提出双提示机制,让图神经网络更公平地处理属性与结构偏差

Towards Fair Graph Prompting: A Dual-Prompt Mechanism for Mitigating Attribute and Structural Bias

  • 设计双模块提示:分别修正输入属性和传播结构偏差
  • 在4个数据集上节点分类准确率超越7个基线方法
  • 适合关注模型公平性的图学习研究者使用

图神经网络(GNN)的自监督预训练已成为主流范式。然而,预训练目标与下游任务之间常存在差距。为弥合这一差距,图提示方法通过可学习提示适配冻结的预训练GNN。尽管有效,现有方法多关注性能提升,忽视公平性问题。由于下游图数据在节点属性和图结构中天然存在偏见,预训练GNN可能产生不同社会群体间差异显著的表示。为此,我们提出自适应双提示(ADPrompt),一种面向公平性的图提示框架。ADPrompt包含两个互补模块:自适应特征校正,学习个性化属性提示以抑制输入层敏感信息;自适应消息校准,引入逐层结构提示,动态调节邻域信息传播。联合优化两模块,在适配预训练GNN的同时缓解属性与结构双重偏见。在四个基准数据集及多种预训练策略下,ADPrompt在节点分类任务中持续优于七个竞争基线。

原文摘要 · Abstract (English)

Self-supervised pre-training on unlabeled graph data has become a common paradigm for Graph Neural Networks (GNNs). However, an objective gap often remains between pre-training objectives and downstream tasks. To bridge this gap, graph prompting methods adapt frozen pre-trained GNNs to specific downstream tasks through learnable prompts. Despite its effectiveness, most existing graph prompting methods primarily focus on improving model performance and largely overlook fairness concerns. As downstream graph data inherently contains biases in both node attributes and graph structures, pre-trained GNNs may produce representations that differ across demographic subgroups. To address this limitation, we propose Adaptive Dual Prompting (ADPrompt), a fairness-aware graph prompting framework for adapting pre-trained GNNs. ADPrompt incorporates two complementary components: Adaptive Feature Rectification, which learns personalized attribute prompts to suppress sensitive information at the input level, and Adaptive Message Calibration, which introduces layer-wise structure prompts to dynamically regulate information propagation from neighboring nodes. By jointly optimizing these two modules, ADPrompt adapts the pre-trained GNN while mitigating both attribute-level and structural bias. Experiments on four benchmark datasets with multiple pre-training strategies demonstrate that ADPrompt consistently outperforms seven competitive baselines in node classification tasks.

图神经网络公平性提示学习

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