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- W4366459006 abstract "Recently, making recommendations for ephemeral groups which contain dynamic users and few historic interactions have received an increasing number of attention. The main challenge of ephemeral group recommender is how to aggregate individual preferences to represent the group's overall preference. Score aggregation and preference aggregation are two commonly-used methods that adopt hand-craft predefined strategies and data-driven strategies, respectively. However, they neglect to take into account the importance of the individual inherent factors such as personality in the group. In addition, they fail to work well due to a small number of interactive records. To address these issues, we propose a Personality-Guided Preference Aggregator (PEGA) for ephemeral group recommendation. Concretely, we first adopt hyper-rectangle to define the concept of Group Personality. We then use the personality attention mechanism to aggregate group preferences. The role of personality in our approach is twofold: (1) To estimate individual users' importance in a group and provide explainability; (2) to alleviate the data sparsity issue that occurred in ephemeral groups. The experimental results demonstrate that our model significantly outperforms the state-of-the-art methods w.r.t. the score of both Recall and NDCG on Amazon and Yelp datasets." @default.
- W4366459006 created "2023-04-22" @default.
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- W4366459006 date "2023-04-18" @default.
- W4366459006 modified "2023-09-23" @default.
- W4366459006 title "PEGA: Personality-Guided Preference Aggregator for Ephemeral Group Recommendation" @default.
- W4366459006 doi "https://doi.org/10.48550/arxiv.2304.08851" @default.
- W4366459006 hasPublicationYear "2023" @default.
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