Contrastive Learning for Implicit Social Factors in Social Media Popularity Prediction

• URL: http://arxiv.org/abs/2410.09345v1
• Date: Sat, 12 Oct 2024 03:25:11 GMT
• Title: Contrastive Learning for Implicit Social Factors in Social Media Popularity Prediction
• Authors: Zhizhen Zhang, Ruihong Qiu, Xiaohui Xie,
• Abstract summary: We study factors introduced by social platforms that impact post popularity. These factors include content relevance, user influence similarity, and user identity. We propose three implicit social factors related to popularity, including content relevance, user influence similarity, and user identity.
• Score: 12.798988947331596
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: On social media sharing platforms, some posts are inherently destined for popularity. Therefore, understanding the reasons behind this phenomenon and predicting popularity before post publication holds significant practical value. The previous work predominantly focuses on enhancing post content extraction for better prediction results. However, certain factors introduced by social platforms also impact post popularity, which has not been extensively studied. For instance, users are more likely to engage with posts from individuals they follow, potentially influencing the popularity of these posts. We term these factors, unrelated to the explicit attractiveness of content, as implicit social factors. Through the analysis of users' post browsing behavior (also validated in public datasets), we propose three implicit social factors related to popularity, including content relevance, user influence similarity, and user identity. To model the proposed social factors, we introduce three supervised contrastive learning tasks. For different task objectives and data types, we assign them to different encoders and control their gradient flows to achieve joint optimization. We also design corresponding sampling and augmentation algorithms to improve the effectiveness of contrastive learning. Extensive experiments on the Social Media Popularity Dataset validate the superiority of our proposed method and also confirm the important role of implicit social factors in popularity prediction. We open source the code at https://github.com/Daisy-zzz/PPCL.git.

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