Robust Detection of Persuasion Techniques in Slavic Languages via Multitask Debiasing and Walking Embeddings

Ewelina Ksiezniak, Krzysztof Wecel, Marcin Sawinski


Abstract
We present our solution to Subtask 1 of the Shared Task on the Detection and Classification of Persuasion Techniques in Texts for Slavic Languages. Our approach integrates fine-tuned multilingual transformer models with two complementary robustness-oriented strategies: Walking Embeddings and Content-Debiasing. With the first, we tried to understand the change in embeddings when various manipulation techniques were applied. The latter leverages a supervised contrastive objective over semantically equivalent yet stylistically divergent text pairs, generated via GPT-4. We conduct extensive experiments, including 5-fold cross-validation and out-of-domain evaluation, and explore the impact of contrastive loss weighting.
Anthology ID:
2025.bsnlp-1.25
Volume:
Proceedings of the 10th Workshop on Slavic Natural Language Processing (Slavic NLP 2025)
Month:
July
Year:
2025
Address:
Vienna, Austria
Editors:
Jakub Piskorski, Pavel Přibáň, Preslav Nakov, Roman Yangarber, Michal Marcinczuk
Venues:
BSNLP | WS
SIG:
Publisher:
Association for Computational Linguistics
Note:
Pages:
224–230
Language:
URL:
https://preview.aclanthology.org/acl25-workshop-ingestion/2025.bsnlp-1.25/
DOI:
Bibkey:
Cite (ACL):
Ewelina Ksiezniak, Krzysztof Wecel, and Marcin Sawinski. 2025. Robust Detection of Persuasion Techniques in Slavic Languages via Multitask Debiasing and Walking Embeddings. In Proceedings of the 10th Workshop on Slavic Natural Language Processing (Slavic NLP 2025), pages 224–230, Vienna, Austria. Association for Computational Linguistics.
Cite (Informal):
Robust Detection of Persuasion Techniques in Slavic Languages via Multitask Debiasing and Walking Embeddings (Ksiezniak et al., BSNLP 2025)
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PDF:
https://preview.aclanthology.org/acl25-workshop-ingestion/2025.bsnlp-1.25.pdf