Higher precision for two-word queries

Authors:
K. L. Kwok
Affiliations:
Queens College, Flushing, NY
Venue:
SIGIR '02 Proceedings of the 25th annual international ACM SIGIR conference on Research and development in information retrieval
Year:
2002

Citing 3
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Abstract

Queries have specific properties, and may need individualized methods and parameters to optimize retrieval. Length is one property. We look at how two-word queries may attain higher precision by re-ranking using word co-occurrence evidence in retrieved documents. Co-occurrence within document context is not sufficient, but window context including sentence context evidence can provide precision improvements at low recall region of 4 to 10% using initial retrieval results, and positively affects pseudo-relevance feedback.