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Discriminative power and retrieval effectiveness of phrasal indexing terms

Sumio Fujita
2000 Proceedings of the ACL-2000 workshop on Recent advances in natural language processing and information retrieval held in conjunction with the 38th Annual Meeting of the Association for Computational Linguistics -   unpublished

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In spite of long controversy, effectiveness of phrasal indexing is not yet clear. Recently, correlation between query length and effect of phrasal indexing is reported. In this paper, terms extracted from the topic set of the NACSIS test collection 1 are analyzed utilizing statistic tools in order to show distribution characteristics of single word/phrasal terms with regard to relevant/nonrelevant documents. Phrasal terms are found to be very good discriminators in general but not all of them
more » ... e effective as supplemental phrasal terms. A distinction of informative / neutral / destructive phrasal terms is introduced. Retrieval effectiveness is examined utilizing query weight ratio of these three categories of phrasal terms.
doi:10.3115/1117755.1117762 fatcat:yuoi5qqc6beufjpkphe6isnofy
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Sumio Fujita. "Discriminative power and retrieval effectiveness of phrasal indexing terms." Proceedings of the ACL-2000 workshop on Recent advances in natural language processing and information retrieval held in conjunction with the 38th Annual Meeting of the Association for Computational Linguistics - (2000)