arXiv:2604.07992cs.IR2026-04

通过因果视角解耦跨域推荐中的共性与特性偏好,提升推荐准确性。

Context-Aware Disentanglement for Cross-Domain Sequential Recommendation: A Causal View

  • 基于因果分析,用变分上下文调节减少干扰因素影响。
  • 在三个真实数据集上显著优于现有方法,性能提升明显。
  • 适合解决用户重叠少、数据稀疏的跨域推荐问题。

跨域序列推荐(CDSR)通过跨领域知识迁移来提升推荐质量,有效缓解数据稀疏和冷启动问题。然而现有方法存在三大局限:(1) 忽视用户行为序列中的上下文差异,导致虚假相关性掩盖真实偏好因果关系;(2) 域共享与域特有偏好的学习受域间梯度冲突阻碍,产生此消彼长的性能波动;(3) 多数方法依赖大量跨域用户重叠这一不切实际的假设。为此,我们提出CoDiS框架,从因果视角出发,精准解耦域共享与域特定偏好。具体包括:变分上下文调节方法以降低上下文混淆效应,专家隔离与选择策略缓解梯度冲突,以及变分对抗解耦模块实现深层表示解耦。在三个真实世界数据集上的大量实验表明,CoDiS在统计显著性上持续优于当前最优的CDSR基线。代码已公开于https://anonymous.4open.science/r/CoDiS-6FA0。

原文摘要 · Abstract (English)

Cross-Domain Sequential Recommendation (CDSR) aims to en-hance recommendation quality by transferring knowledge across domains, offering effective solutions to data sparsity and cold-start issues. However, existing methods face three major limitations: (1) they overlook varying contexts in user interaction sequences, resulting in spurious correlations that obscure the true causal relationships driving user preferences; (2) the learning of domain- shared and domain-specific preferences is hindered by gradient conflicts between domains, leading to a seesaw effect where performance in one domain improves at the expense of the other; (3) most methods rely on the unrealistic assumption of substantial user overlap across domains. To address these issues, we propose CoDiS, a context-aware disentanglement framework grounded in a causal view to accurately disentangle domain-shared and domain-specific preferences. Specifically, Our approach includes a variational context adjustment method to reduce confounding effects of contexts, expert isolation and selection strategies to resolve gradient conflict, and a variational adversarial disentangling module for the thorough disentanglement of domain-shared and domain-specific representations. Extensive experiments on three real-world datasets demonstrate that CoDiS consistently outperforms state-of-the-art CDSR baselines with statistical significance. Code is available at:https://anonymous.4open.science/r/CoDiS-6FA0.

跨域推荐因果建模序列推荐

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