Detect Rumors in Microblog Posts for Low-Resource Domains via Adversarial Contrastive Learning

Hongzhan Lin, Jing Ma, Liangliang Chen, Zhiwei Yang, Mingfei Cheng, Chen Guang


Abstract
Massive false rumors emerging along with breaking news or trending topics severely hinder the truth. Existing rumor detection approaches achieve promising performance on the yesterday’s news, since there is enough corpus collected from the same domain for model training. However, they are poor at detecting rumors about unforeseen events especially those propagated in minority languages due to the lack of training data and prior knowledge (i.e., low-resource regimes). In this paper, we propose an adversarial contrastive learning framework to detect rumors by adapting the features learned from well-resourced rumor data to that of the low-resourced. Our model explicitly overcomes the restriction of domain and/or language usage via language alignment and a novel supervised contrastive training paradigm. Moreover, we develop an adversarial augmentation mechanism to further enhance the robustness of low-resource rumor representation. Extensive experiments conducted on two low-resource datasets collected from real-world microblog platforms demonstrate that our framework achieves much better performance than state-of-the-art methods and exhibits a superior capacity for detecting rumors at early stages.
Anthology ID:
2022.findings-naacl.194
Volume:
Findings of the Association for Computational Linguistics: NAACL 2022
Month:
July
Year:
2022
Address:
Seattle, United States
Venue:
Findings
SIG:
Publisher:
Association for Computational Linguistics
Note:
Pages:
2543–2556
Language:
URL:
https://aclanthology.org/2022.findings-naacl.194
DOI:
10.18653/v1/2022.findings-naacl.194
Bibkey:
Cite (ACL):
Hongzhan Lin, Jing Ma, Liangliang Chen, Zhiwei Yang, Mingfei Cheng, and Chen Guang. 2022. Detect Rumors in Microblog Posts for Low-Resource Domains via Adversarial Contrastive Learning. In Findings of the Association for Computational Linguistics: NAACL 2022, pages 2543–2556, Seattle, United States. Association for Computational Linguistics.
Cite (Informal):
Detect Rumors in Microblog Posts for Low-Resource Domains via Adversarial Contrastive Learning (Lin et al., Findings 2022)
Copy Citation:
PDF:
https://aclanthology.org/2022.findings-naacl.194.pdf
Video:
 https://aclanthology.org/2022.findings-naacl.194.mp4
Code
 daniellin97/aclr4rumor-naacl2022