Effective Multi-Task Learning for Biomedical Named Entity Recognition

João Ruano, Gonçalo Correia, Leonor Barreiros, Afonso Mendes


Abstract
Biomedical Named Entity Recognition presents significant challenges due to the complexity of biomedical terminology and inconsistencies in annotation across datasets. This paper introduces SRU-NER (Slot-based Recurrent Unit NER), a novel approach designed to handle nested named entities while integrating multiple datasets through an effective multi-task learning strategy. SRU-NER mitigates annotation gaps by dynamically adjusting loss computation to avoid penalizing predictions of entity types absent in a given dataset. Through extensive experiments, including a cross-corpus evaluation and human assessment of the model’s predictions, SRU-NER achieves competitive performance in biomedical and general-domain NER tasks, while improving cross-domain generalization.
Anthology ID:
2025.bionlp-1.20
Volume:
ACL 2025
Month:
August
Year:
2025
Address:
Viena, Austria
Editors:
Dina Demner-Fushman, Sophia Ananiadou, Makoto Miwa, Junichi Tsujii
Venues:
BioNLP | WS
SIG:
Publisher:
Association for Computational Linguistics
Note:
Pages:
225–239
Language:
URL:
https://preview.aclanthology.org/acl25-workshop-ingestion/2025.bionlp-1.20/
DOI:
Bibkey:
Cite (ACL):
João Ruano, Gonçalo Correia, Leonor Barreiros, and Afonso Mendes. 2025. Effective Multi-Task Learning for Biomedical Named Entity Recognition. In ACL 2025, pages 225–239, Viena, Austria. Association for Computational Linguistics.
Cite (Informal):
Effective Multi-Task Learning for Biomedical Named Entity Recognition (Ruano et al., BioNLP 2025)
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PDF:
https://preview.aclanthology.org/acl25-workshop-ingestion/2025.bionlp-1.20.pdf
Supplementarymaterial:
 2025.bionlp-1.20.SupplementaryMaterial.txt
Supplementarymaterial:
 2025.bionlp-1.20.SupplementaryMaterial.zip