A Belief Model of Query Difficulty That Uses Subjective Logic

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The difficulty of a user query can affect the performance of Information Retrieval (IR) systems. This work presents a formal model for quantifying and reasoning about query difficulty as follows: Query difficulty is considered to be a subjective belief, which is formulated on the basis of various types of evidence. This allows us to define a belief model and a set of operators for combining evidence of query difficulty. The belief model uses subjective logic , a type of probabilistic logic for modeling uncertainties. An application of this model with semantic and pragmatic evidence about 150 TREC queries illustrates the potential flexibility of this framework in expressing and combining evidence. To our knowledge, this is the first application of subjective logic to IR.
Original languageEnglish
Title of host publicationICTIR '09 Proceedings of the 2nd International Conference on Theory of Information Retrieval: Advances in Information Retrieval Theory
PublisherSpringer
Publication date2009
Pages92-103
Publication statusPublished - 2009
Externally publishedYes

Bibliographical note

Published in:
· Proceeding
ICTIR '09 Proceedings of the 2nd International Conference on Theory of Information Retrieval: Advances in Information Retrieval Theory
Pages 92 - 103
Springer-Verlag Berlin, Heidelberg ©2009
ISBN: 978-3-642-04416-8 doi>10.1007/978-3-642-04417-5_9

ID: 38252118