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NaijaHate: Evaluating Hate Speech Detection on Nigerian Twitter Using Representative Data

Manuel Tonneau, Pedro Quinta De Castro, Karim Lasri, Ibrahim Farouq, Lakshmi Subramanian, Victor Orozco-Olvera, Samuel Fraiberger


Abstract
To address the global issue of online hate, hate speech detection (HSD) systems are typically developed on datasets from the United States, thereby failing to generalize to English dialects from the Majority World. Furthermore, HSD models are often evaluated on non-representative samples, raising concerns about overestimating model performance in real-world settings. In this work, we introduce NaijaHate, the first dataset annotated for HSD which contains a representative sample of Nigerian tweets. We demonstrate that HSD evaluated on biased datasets traditionally used in the literature consistently overestimates real-world performance by at least two-fold. We then propose NaijaXLM-T, a pretrained model tailored to the Nigerian Twitter context, and establish the key role played by domain-adaptive pretraining and finetuning in maximizing HSD performance. Finally, owing to the modest performance of HSD systems in real-world conditions, we find that content moderators would need to review about ten thousand Nigerian tweets flagged as hateful daily to moderate 60% of all hateful content, highlighting the challenges of moderating hate speech at scale as social media usage continues to grow globally. Taken together, these results pave the way towards robust HSD systems and a better protection of social media users from hateful content in low-resource settings.
Anthology ID:
2024.acl-long.488
Original:
2024.acl-long.488v1
Version 2:
2024.acl-long.488v2
Volume:
Proceedings of the 62nd Annual Meeting of the Association for Computational Linguistics (Volume 1: Long Papers)
Month:
August
Year:
2024
Address:
Bangkok, Thailand
Editors:
Lun-Wei Ku, Andre Martins, Vivek Srikumar
Venue:
ACL
SIG:
Publisher:
Association for Computational Linguistics
Note:
Pages:
9020–9040
Language:
URL:
https://aclanthology.org/2024.acl-long.488
DOI:
10.18653/v1/2024.acl-long.488
Bibkey:
Cite (ACL):
Manuel Tonneau, Pedro Quinta De Castro, Karim Lasri, Ibrahim Farouq, Lakshmi Subramanian, Victor Orozco-Olvera, and Samuel Fraiberger. 2024. NaijaHate: Evaluating Hate Speech Detection on Nigerian Twitter Using Representative Data. In Proceedings of the 62nd Annual Meeting of the Association for Computational Linguistics (Volume 1: Long Papers), pages 9020–9040, Bangkok, Thailand. Association for Computational Linguistics.
Cite (Informal):
NaijaHate: Evaluating Hate Speech Detection on Nigerian Twitter Using Representative Data (Tonneau et al., ACL 2024)
Copy Citation:
PDF:
https://aclanthology.org/2024.acl-long.488.pdf