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Home / Proceedings / Proceedings of the AAAI Conference on Artificial Intelligence, 36 / No. 10: AAAI-22 Technical Tracks 10

Improving Biomedical Information Retrieval with Neural Retrievers

February 1, 2023

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Authors

Man Luo

Arizona State University


Arindam Mitra

Microsoft


Tejas Gokhale

Arizona State University


Chitta Baral

Arizona State University


DOI:

10.1609/aaai.v36i10.21352


Abstract:

Information retrieval (IR) is essential in search engines and dialogue systems as well as natural language processing tasks such as open-domain question answering. IR serve an important function in the biomedical domain, where content and sources of scientific knowledge may evolve rapidly. Although neural retrievers have surpassed traditional IR approaches such as TF-IDF and BM25 in standard open-domain question answering tasks, they are still found lacking in the biomedical domain. In this paper, we seek to improve information retrieval (IR) using neural retrievers (NR) in the biomedical domain, and achieve this goal using a three-pronged approach. First, to tackle the relative lack of data in the biomedical domain, we propose a template-based question generation method that can be leveraged to train neural retriever models. Second, we develop two novel pre-training tasks that are closely aligned to the downstream task of information retrieval. Third, we introduce the ``Poly-DPR'' model which encodes each context into multiple context vectors. Extensive experiments and analysis on the BioASQ challenge suggest that our proposed method leads to large gains over existing neural approaches and beats BM25 in the small-corpus setting. We show that BM25 and our method can complement each other, and a simple hybrid model leads to further gains in the large corpus setting.

Topics: AAAI

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HOW TO CITE:

Man Luo||Arindam Mitra||Tejas Gokhale||Chitta Baral Improving Biomedical Information Retrieval with Neural Retrievers Proceedings of the AAAI Conference on Artificial Intelligence (2022) 11038-11046.

Man Luo||Arindam Mitra||Tejas Gokhale||Chitta Baral Improving Biomedical Information Retrieval with Neural Retrievers AAAI 2022, 11038-11046.

Man Luo||Arindam Mitra||Tejas Gokhale||Chitta Baral (2022). Improving Biomedical Information Retrieval with Neural Retrievers. Proceedings of the AAAI Conference on Artificial Intelligence, 11038-11046.

Man Luo||Arindam Mitra||Tejas Gokhale||Chitta Baral. Improving Biomedical Information Retrieval with Neural Retrievers. Proceedings of the AAAI Conference on Artificial Intelligence 2022 p.11038-11046.

Man Luo||Arindam Mitra||Tejas Gokhale||Chitta Baral. 2022. Improving Biomedical Information Retrieval with Neural Retrievers. "Proceedings of the AAAI Conference on Artificial Intelligence". 11038-11046.

Man Luo||Arindam Mitra||Tejas Gokhale||Chitta Baral. (2022) "Improving Biomedical Information Retrieval with Neural Retrievers", Proceedings of the AAAI Conference on Artificial Intelligence, p.11038-11046

Man Luo||Arindam Mitra||Tejas Gokhale||Chitta Baral, "Improving Biomedical Information Retrieval with Neural Retrievers", AAAI, p.11038-11046, 2022.

Man Luo||Arindam Mitra||Tejas Gokhale||Chitta Baral. "Improving Biomedical Information Retrieval with Neural Retrievers". Proceedings of the AAAI Conference on Artificial Intelligence, 2022, p.11038-11046.

Man Luo||Arindam Mitra||Tejas Gokhale||Chitta Baral. "Improving Biomedical Information Retrieval with Neural Retrievers". Proceedings of the AAAI Conference on Artificial Intelligence, (2022): 11038-11046.

Man Luo||Arindam Mitra||Tejas Gokhale||Chitta Baral. Improving Biomedical Information Retrieval with Neural Retrievers. AAAI[Internet]. 2022[cited 2023]; 11038-11046.


ISSN: 2374-3468


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