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Prompting Explicit and Implicit Knowledge for Multi-hop Question Answering Based on Human Reading Process

Guangming Huang, Yunfei Long, Cunjin Luo, Jiaxing Shen, Xia Sun


Abstract
Pre-trained language models (PLMs) leverage chains-of-thought (CoT) to simulate human reasoning and inference processes, achieving proficient performance in multi-hop QA. However, a gap persists between PLMs’ reasoning abilities and those of humans when tackling complex problems. Psychological studies suggest a vital connection between explicit information in passages and human prior knowledge during reading. Nevertheless, current research has given insufficient attention to linking input passages and PLMs’ pre-training-based knowledge from the perspective of human cognition studies. In this study, we introduce a Prompting Explicit and Implicit knowledge (PEI) framework, which uses prompts to connect explicit and implicit knowledge, aligning with human reading process for multi-hop QA. We consider the input passages as explicit knowledge, employing them to elicit implicit knowledge through unified prompt reasoning. Furthermore, our model incorporates type-specific reasoning via prompts, a form of implicit knowledge. Experimental results show that PEI performs comparably to the state-of-the-art on HotpotQA. Ablation studies confirm the efficacy of our model in bridging and integrating explicit and implicit knowledge.
Anthology ID:
2024.lrec-main.1154
Volume:
Proceedings of the 2024 Joint International Conference on Computational Linguistics, Language Resources and Evaluation (LREC-COLING 2024)
Month:
May
Year:
2024
Address:
Torino, Italia
Editors:
Nicoletta Calzolari, Min-Yen Kan, Veronique Hoste, Alessandro Lenci, Sakriani Sakti, Nianwen Xue
Venues:
LREC | COLING
SIG:
Publisher:
ELRA and ICCL
Note:
Pages:
13179–13189
Language:
URL:
https://aclanthology.org/2024.lrec-main.1154
DOI:
Bibkey:
Cite (ACL):
Guangming Huang, Yunfei Long, Cunjin Luo, Jiaxing Shen, and Xia Sun. 2024. Prompting Explicit and Implicit Knowledge for Multi-hop Question Answering Based on Human Reading Process. In Proceedings of the 2024 Joint International Conference on Computational Linguistics, Language Resources and Evaluation (LREC-COLING 2024), pages 13179–13189, Torino, Italia. ELRA and ICCL.
Cite (Informal):
Prompting Explicit and Implicit Knowledge for Multi-hop Question Answering Based on Human Reading Process (Huang et al., LREC-COLING 2024)
Copy Citation:
PDF:
https://aclanthology.org/2024.lrec-main.1154.pdf