Aggression Identification Using Deep Learning and Data Augmentation

Julian Risch, Ralf Krestel


Abstract
Social media platforms allow users to share and discuss their opinions online. However, a minority of user posts is aggressive, thereby hinders respectful discussion, and — at an extreme level — is liable to prosecution. The automatic identification of such harmful posts is important, because it can support the costly manual moderation of online discussions. Further, the automation allows unprecedented analyses of discussion datasets that contain millions of posts. This system description paper presents our submission to the First Shared Task on Aggression Identification. We propose to augment the provided dataset to increase the number of labeled comments from 15,000 to 60,000. Thereby, we introduce linguistic variety into the dataset. As a consequence of the larger amount of training data, we are able to train a special deep neural net, which generalizes especially well to unseen data. To further boost the performance, we combine this neural net with three logistic regression classifiers trained on character and word n-grams, and hand-picked syntactic features. This ensemble is more robust than the individual single models. Our team named “Julian” achieves an F1-score of 60% on both English datasets, 63% on the Hindi Facebook dataset, and 38% on the Hindi Twitter dataset.
Anthology ID:
W18-4418
Volume:
Proceedings of the First Workshop on Trolling, Aggression and Cyberbullying (TRAC-2018)
Month:
August
Year:
2018
Address:
Santa Fe, New Mexico, USA
Venues:
COLING | TRAC | WS
SIG:
Publisher:
Association for Computational Linguistics
Note:
Pages:
150–158
Language:
URL:
https://aclanthology.org/W18-4418
DOI:
Bibkey:
Cite (ACL):
Julian Risch and Ralf Krestel. 2018. Aggression Identification Using Deep Learning and Data Augmentation. In Proceedings of the First Workshop on Trolling, Aggression and Cyberbullying (TRAC-2018), pages 150–158, Santa Fe, New Mexico, USA. Association for Computational Linguistics.
Cite (Informal):
Aggression Identification Using Deep Learning and Data Augmentation (Risch & Krestel, 2018)
Copy Citation:
PDF:
https://aclanthology.org/W18-4418.pdf
Code
 julian-risch/TRAC-COLING2018