Entity-level Factual Adaptiveness of Fine-tuning based Abstractive Summarization Models

Jongyoon Song, Nohil Park, Bongkyu Hwang, Jaewoong Yun, Seongho Joe, Youngjune Gwon, Sungroh Yoon


Abstract
Abstractive summarization models often generate factually inconsistent content particularly when the parametric knowledge of the model conflicts with the knowledge in the input document. In this paper, we analyze the robustness of fine-tuning based summarization models to the knowledge conflict, which we call factual adaptiveness. We utilize pre-trained language models to construct evaluation sets and find that factual adaptiveness is not strongly correlated with factual consistency on original datasets. Furthermore, we introduce a controllable counterfactual data augmentation method where the degree of knowledge conflict within the augmented data can be adjustable. Our experimental results on two pre-trained language models (PEGASUS and BART) and two fine-tuning datasets (XSum and CNN/DailyMail) demonstrate that our method enhances factual adaptiveness while achieving factual consistency on original datasets on par with the contrastive learning baseline.
Anthology ID:
2024.eacl-long.55
Volume:
Proceedings of the 18th Conference of the European Chapter of the Association for Computational Linguistics (Volume 1: Long Papers)
Month:
March
Year:
2024
Address:
St. Julian’s, Malta
Editors:
Yvette Graham, Matthew Purver
Venue:
EACL
SIG:
Publisher:
Association for Computational Linguistics
Note:
Pages:
915–929
Language:
URL:
https://aclanthology.org/2024.eacl-long.55
DOI:
Bibkey:
Cite (ACL):
Jongyoon Song, Nohil Park, Bongkyu Hwang, Jaewoong Yun, Seongho Joe, Youngjune Gwon, and Sungroh Yoon. 2024. Entity-level Factual Adaptiveness of Fine-tuning based Abstractive Summarization Models. In Proceedings of the 18th Conference of the European Chapter of the Association for Computational Linguistics (Volume 1: Long Papers), pages 915–929, St. Julian’s, Malta. Association for Computational Linguistics.
Cite (Informal):
Entity-level Factual Adaptiveness of Fine-tuning based Abstractive Summarization Models (Song et al., EACL 2024)
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PDF:
https://aclanthology.org/2024.eacl-long.55.pdf