Co-DETECT: Collaborative Discovery of Edge Cases in Text Classification

Chenfei Xiong, Jingwei Ni, Yu Fan, Vilém Zouhar, Donya Rooein, Lorena Calvo-Bartolomé, Alexander Miserlis Hoyle, Zhijing Jin, Mrinmaya Sachan, Markus Leippold, Dirk Hovy, Mennatallah El-Assady, Elliott Ash


Abstract
We introduce Co-DETECT (Collaborative Discovery of Edge cases in TExt ClassificaTion), a novel mixed-initiative annotation framework that integrates human expertise with automatic annotation guided by large language models (LLMs). Co-DETECT starts with an initial, sketch-level codebook and dataset provided by a domain expert, then leverages the LLM to annotate the data and identify edge cases that are not well described by the initial codebook. Specifically, Co-DETECT flags challenging examples, induces high-level, generalizable descriptions of edge cases, and assists user in incorporating edge case handling rules to improve the codebook. This iterative process enables more effective handling of nuanced phenomena through compact, generalizable annotation rules. Extensive user study, qualitative and quantitative analyses prove the effectiveness of Co-DETECT.
Anthology ID:
2025.emnlp-demos.25
Volume:
Proceedings of the 2025 Conference on Empirical Methods in Natural Language Processing: System Demonstrations
Month:
November
Year:
2025
Address:
Suzhou, China
Editors:
Ivan Habernal, Peter Schulam, Jörg Tiedemann
Venue:
EMNLP
SIG:
Publisher:
Association for Computational Linguistics
Note:
Pages:
354–364
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URL:
https://preview.aclanthology.org/ingest-emnlp/2025.emnlp-demos.25/
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Bibkey:
Cite (ACL):
Chenfei Xiong, Jingwei Ni, Yu Fan, Vilém Zouhar, Donya Rooein, Lorena Calvo-Bartolomé, Alexander Miserlis Hoyle, Zhijing Jin, Mrinmaya Sachan, Markus Leippold, Dirk Hovy, Mennatallah El-Assady, and Elliott Ash. 2025. Co-DETECT: Collaborative Discovery of Edge Cases in Text Classification. In Proceedings of the 2025 Conference on Empirical Methods in Natural Language Processing: System Demonstrations, pages 354–364, Suzhou, China. Association for Computational Linguistics.
Cite (Informal):
Co-DETECT: Collaborative Discovery of Edge Cases in Text Classification (Xiong et al., EMNLP 2025)
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https://preview.aclanthology.org/ingest-emnlp/2025.emnlp-demos.25.pdf