Modeling Domain and Feedback Transitions for Cross-Domain Sequential Recommendation

• URL: http://arxiv.org/abs/2408.08209v1
• Date: Thu, 15 Aug 2024 15:18:55 GMT
• Title: Modeling Domain and Feedback Transitions for Cross-Domain Sequential Recommendation
• Authors: Changshuo Zhang, Teng Shi, Xiao Zhang, Qi Liu, Ruobing Xie, Jun Xu, Ji-Rong Wen,
• Abstract summary: $textTransition2$ is a novel method to model transitions across both domains and types of user feedback. We introduce a transition-aware graph encoder based on user history, assigning different weights to edges according to the feedback type. We encode the user history using a cross-transition multi-head self-attention, incorporating various masks to distinguish different types of transitions.
• Score: 60.09293734134179
• License:
• Abstract: Nowadays, many recommender systems encompass various domains to cater to users' diverse needs, leading to user behaviors transitioning across different domains. In fact, user behaviors across different domains reveal changes in preference toward recommended items. For instance, a shift from negative feedback to positive feedback indicates improved user satisfaction. However, existing cross-domain sequential recommendation methods typically model user interests by focusing solely on information about domain transitions, often overlooking the valuable insights provided by users' feedback transitions. In this paper, we propose $\text{Transition}^2$, a novel method to model transitions across both domains and types of user feedback. Specifically, $\text{Transition}^2$ introduces a transition-aware graph encoder based on user history, assigning different weights to edges according to the feedback type. This enables the graph encoder to extract historical embeddings that capture the transition information between different domains and feedback types. Subsequently, we encode the user history using a cross-transition multi-head self-attention, incorporating various masks to distinguish different types of transitions. Finally, we integrate these modules to make predictions across different domains. Experimental results on two public datasets demonstrate the effectiveness of $\text{Transition}^2$.

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