FicSim: A Dataset for Multi-Faceted Semantic Similarity in Long-Form Fiction

Natasha Johnson, Amanda Bertsch, Maria-Emil Deal, Emma Strubell


Abstract
As language models become capable of processing increasingly long and complex texts, there has been growing interest in their application within computational literary studies. However, evaluating the usefulness of these models for such tasks remains challenging due to the cost of fine-grained annotation for long-form texts and the data contamination concerns inherent in using public-domain literature. Current embedding similarity datasets are not suitable for evaluating literary-domain tasks because of a focus on coarse-grained similarity and primarily on very short text. We assemble and release a dataset, FicSim, of long-form, recently written fiction, including scores along 12 axes of similarity informed by author-produced metadata and validated by digital humanities scholars. We evaluate a suite of embedding models on this task, demonstrating a tendency across models to focus on surface-level features over semantic categories that would be useful for computational literary studies tasks. Throughout our data-collection process, we prioritize author agency and rely on continual, informed author consent.
Anthology ID:
2025.findings-emnlp.1375
Volume:
Findings of the Association for Computational Linguistics: EMNLP 2025
Month:
November
Year:
2025
Address:
Suzhou, China
Editors:
Christos Christodoulopoulos, Tanmoy Chakraborty, Carolyn Rose, Violet Peng
Venue:
Findings
SIG:
Publisher:
Association for Computational Linguistics
Note:
Pages:
25228–25246
Language:
URL:
https://preview.aclanthology.org/author-page-yu-wang-polytechnic/2025.findings-emnlp.1375/
DOI:
10.18653/v1/2025.findings-emnlp.1375
Bibkey:
Cite (ACL):
Natasha Johnson, Amanda Bertsch, Maria-Emil Deal, and Emma Strubell. 2025. FicSim: A Dataset for Multi-Faceted Semantic Similarity in Long-Form Fiction. In Findings of the Association for Computational Linguistics: EMNLP 2025, pages 25228–25246, Suzhou, China. Association for Computational Linguistics.
Cite (Informal):
FicSim: A Dataset for Multi-Faceted Semantic Similarity in Long-Form Fiction (Johnson et al., Findings 2025)
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PDF:
https://preview.aclanthology.org/author-page-yu-wang-polytechnic/2025.findings-emnlp.1375.pdf
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 2025.findings-emnlp.1375.checklist.pdf