An evaluation and analysis of incorporating term dependency for ad-hoc retrieval
Lang, Hao and Wang, Bin and Jones, Gareth J.F. and Li, Jintao and Liu, Yi-Xuan (2008) An evaluation and analysis of incorporating term dependency for ad-hoc retrieval. In: 30th European Conference on Information Retrieval Research (ECIR 2008), , 30 Mar - 3 Apr 2008, Glasgow, Scotland.
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Although many retrieval models incorporating term dependency have been developed, it is still unclear whether term dependency information can consistently enhance retrieval performance for different queries. We present a novel model that captures the main components of a topic and the relationship between those components and the power of term dependency to improve retrieval performance. Experimental results demonstrate that the power of term dependency strongly depends on the relationship between these components. Without relevance information, the model is still useful by predicting the components based on global statistical information. We show the applicability of the model for adaptively incorporating term dependency for individual queries.
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