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HDNR: A Hyperbolic-Based Debiased Approach for Personalized News Recommendation

Published: 18 July 2023 Publication History

Abstract

Personalized news recommendation aims to recommend candidate news to the target user, according to the clicked news history. The user-news interaction data exhibits power-law distribution, however, existing works usually learn representations in Euclidean space which makes inconsistent capacities between data space and embedding space, leading to severe representation distortion problem. Besides, the existence of conformity bias, a potential cause of power-law distribution, may introduce biased guidance to learn user representations. In this paper, we propose a novel debiased method based on hyperbolic space, named HDNR, to tackle the above problems. Specifically, first, we employ hyperboloid model with exponential growth capacity to conduct user and news modeling, in order to solve inconsistent space capacities problem and obtain low distortion representations. Second, we design a re-weighting aggregation module to further mitigate conformity bias in data distribution, through considering local importance of the clicked news among contextual history and its global popularity degree simultaneously. Finally, we calculate the relevance score between target user and candidate news representations. We conduct experiments on two real-world news recommendation datasets MIND-Large, MIND-Small and empirical results demonstrate the effectiveness of our approach from multiple perspectives.

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      cover image ACM Conferences
      SIGIR '23: Proceedings of the 46th International ACM SIGIR Conference on Research and Development in Information Retrieval
      July 2023
      3567 pages
      ISBN:9781450394086
      DOI:10.1145/3539618
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      Published: 18 July 2023

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      Author Tags

      1. conformity bias
      2. hyperbolic space
      3. news recommendation

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      • (2024)Configurable Fairness for New Item Recommendation Considering Entry Time of ItemsProceedings of the 47th International ACM SIGIR Conference on Research and Development in Information Retrieval10.1145/3626772.3657694(437-447)Online publication date: 10-Jul-2024
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      • (2024)Improving the Text Convolution Mechanism with Large Language Model for Review-Based Recommendation2024 IEEE International Conference on Big Data (BigData)10.1109/BigData62323.2024.10825014(6977-6981)Online publication date: 15-Dec-2024
      • (2024)Causal Behavior Pattern Inference for News Recommendation Through Multi-interest MatchingWeb Information Systems Engineering – WISE 202410.1007/978-981-96-0570-5_13(179-190)Online publication date: 2-Dec-2024

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