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Data Analysis and Knowledge Discovery  2023, Vol. 7 Issue (11): 68-78    DOI: 10.11925/infotech.2096-3467.2022.0905
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Detecting Social Media Rumors Based on Multimodal Heterogeneous Graph
Qiang Zishan,Gu Yijun()
College of Information and Cyber Security, People’s Public Security University of China, Beijing 100038, China
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Abstract  

[Objective] This paper proposes a social media rumor detection model based on the multimodal heterogeneous graph, aiming to verify the correlation between different rumor modalities and improve the accuracy of rumor detection. [Methods] First, we retrieved multimodal posts from social platforms. Then, we extracted feature representations of texts, pictures, and user attributes through preprocessing. Third, we constructed a heterogeneous graph based on the correlation between texts, pictures, and users. Fourth, we extracted the embeddings of text-type nodes according to their specified meta path. Finally, we input the embedding into the classifier to determine whether or not it is a rumor. [Results] We examined the proposed model with two open data sets. The accuracy of our model reached 91.3% and 93.8%, which were also higher than the baseline models. [Limitations] The three types of nodes from the sharing multimodal rumors will make the heterogeneous graph sparse. The proposed model is more suitable for small topic communities. [Conclusions] There is a correlation between different modalities of rumors, which helps the proposed model effectively detect multimodal rumors.

Key wordsRumor Detection      Node Embedding      Multimodal      Heterogeneous Graph      Attention Mechanism     
Received: 28 August 2022      Published: 22 March 2023
ZTFLH:  TP391 G350  
Fund:Ministry of Public Security Science and Technology to Strengthen the Basic Work of the Police Project(2020GABJC02);Fundamental Research Funds for the Central Universities(2022JKF02039)
Corresponding Authors: Gu Yijun,E-mail:guyijun@ppsuc.edu.cn。   

Cite this article:

Qiang Zishan, Gu Yijun. Detecting Social Media Rumors Based on Multimodal Heterogeneous Graph. Data Analysis and Knowledge Discovery, 2023, 7(11): 68-78.

URL:

https://manu44.magtech.com.cn/Jwk_infotech_wk3/EN/10.11925/infotech.2096-3467.2022.0905     OR     https://manu44.magtech.com.cn/Jwk_infotech_wk3/EN/Y2023/V7/I11/68

Example of Multimodal Information Heterogeneous Graph
Het_MMRD Model
Multimodal Instance Coding
数据集 总数 谣言 非谣言 文本
数量
用户
数量
图片
数量
节点
总数
MediaEval2015 1 144 385 759 1 144 1 100 40 2 284
MediaEval2016 1 206 400 806 1 206 1 157 96 2 459
Data Statistics
模态 模型 Acc P R F1
单模态模型 Text 0.555 0.368 0.405 0.386
Picture 0.454 0.269 0.439 0.333
多模态模型 FCC 0.655 0.500 0.506 0.503
DCC 0.620 0.431 0.317 0.365
Add_Att 0.838 0.728 0.848 0.784
Dot_Att 0.681 0.568 0.317 0.407
MicroBlog-HAN 0.887 0.835 0.835 0.835
Het_MMRD 0.913 0.839 0.924 0.880
Experimental Results of MediaEval2015 Dataset
模态 模型 Acc P R F1
单模态模型 Text 0.558 0.354 0.430 0.389
Picture 0.482 0.279 0.537 0.367
多模态模型 FCC 0.632 0.432 0.405 0.418
DCC 0.591 0.384 0.418 0.400
Add_Att 0.711 0.571 0.456 0.507
Dot_Att 0.703 0.557 0.430 0.485
MicroBlog-HAN 0.909 0.880 0.835 0.857
Het_MMRD 0.938 0.985 0.823 0.897
Experimental Results of MediaEval2016 Dataset
数据集 模型 Acc P R F1
MediaEval2015 Het_MMRDwithout T-U-T 0.873 0.798 0.848 0.822
Het_MMRDwithout T-P-T 0.900 0.833 0.886 0.859
Het_MMRDwithout T-U-P-U-T 0.887 0.791 0.911 0.847
Het_MMRDwithout T-P-U-P-T 0.908 0.837 0.911 0.873
Het_MMRD 0.913 0.839 0.924 0.880
MediaEval2016 Het_MMRDwithout T-U-T 0.930 0.984 0.798 0.881
Het_MMRDwithout T-P-T 0.913 0.953 0.772 0.853
Het_MMRDwithout T-U-P-U-T 0.901 0.983 0.709 0.824
Het_MMRDwithout T-P-U-P-T 0.926 0.984 0.785 0.873
Het_MMRD 0.938 0.985 0.823 0.897
Comparison of Ablation Results
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