The role of knowledge in conceptual retrieval: a study in the domain of clinical medicine

TitleThe role of knowledge in conceptual retrieval: a study in the domain of clinical medicine
Publication TypeConference Papers
Year of Publication2006
AuthorsJimmy Lin, Demner-Fushman D
Conference NameProceedings of the 29th annual international ACM SIGIR conference on Research and development in information retrieval
Date Published2006///
PublisherACM
Conference LocationNew York, NY, USA
ISBN Number1-59593-369-7
KeywordsQuestion answering, reranking, semantic models
Abstract

Despite its intuitive appeal, the hypothesis that retrieval at the level of "concepts" should outperform purely term-based approaches remains unverified empirically. In addition, the use of "knowledge" has not consistently resulted in performance gains. After identifying possible reasons for previous negative results, we present a novel framework for "conceptual retrieval" that articulates the types of knowledge that are important for information seeking. We instantiate this general framework in the domain of clinical medicine based on the principles of evidence-based medicine (EBM). Experiments show that an EBM-based scoring algorithm dramatically outperforms a state-of-the-art baseline that employs only term statistics. Ablation studies further yield a better understanding of the performance contributions of different components. Finally, we discuss how other domains can benefit from knowledge-based approaches.

URLhttp://doi.acm.org/10.1145/1148170.1148191
DOI10.1145/1148170.1148191