QMUL at SemEval-2025 Task 11: Explicit Emotion Detection with EmoLex, Feature Engineering, and Threshold-Optimized Multi-Label Classification

Angeline Wang, Aditya Gupta, Iran Roman, Arkaitz Zubiaga


Abstract
SemEval 2025 Task 11 Track A explores the detection of multiple emotions in text samples. Our best model combined BERT (fine-tuned on an emotion dataset) predictions and engineered features with EmoLex words appended. Together, these were used as input to train a multi-layer perceptron. This achieved a final test set Macro F1 score of 0.56. Compared to only using BERT predictions, our system improves performance by 43.6%.
Anthology ID:
2025.semeval-1.128
Volume:
Proceedings of the 19th International Workshop on Semantic Evaluation (SemEval-2025)
Month:
July
Year:
2025
Address:
Vienna, Austria
Editors:
Sara Rosenthal, Aiala Rosá, Debanjan Ghosh, Marcos Zampieri
Venues:
SemEval | WS
SIG:
Publisher:
Association for Computational Linguistics
Note:
Pages:
959–964
Language:
URL:
https://preview.aclanthology.org/corrections-2025-08/2025.semeval-1.128/
DOI:
Bibkey:
Cite (ACL):
Angeline Wang, Aditya Gupta, Iran Roman, and Arkaitz Zubiaga. 2025. QMUL at SemEval-2025 Task 11: Explicit Emotion Detection with EmoLex, Feature Engineering, and Threshold-Optimized Multi-Label Classification. In Proceedings of the 19th International Workshop on Semantic Evaluation (SemEval-2025), pages 959–964, Vienna, Austria. Association for Computational Linguistics.
Cite (Informal):
QMUL at SemEval-2025 Task 11: Explicit Emotion Detection with EmoLex, Feature Engineering, and Threshold-Optimized Multi-Label Classification (Wang et al., SemEval 2025)
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https://preview.aclanthology.org/corrections-2025-08/2025.semeval-1.128.pdf