Back to the roots : mean-variance analysis of relevance estimations
Zuccon, Guido, Azzopardi, Leif, & van Rijsbergen, Keith (2011) Back to the roots : mean-variance analysis of relevance estimations. In Lecture Notes in Computer Science : Advances in Information Retrieval Theory, Springer, Dublin, Ireland, pp. 716-720.
Recently, mean-variance analysis has been proposed as a novel paradigm to model document ranking in Information Retrieval. The main merit of this approach is that it diversifies the ranking of retrieved documents. In its original formulation, the strategy considers both the mean of relevance estimates of retrieved documents and their variance. How- ever, when this strategy has been empirically instantiated, the concepts of mean and variance are discarded in favour of a point-wise estimation of relevance (to replace the mean) and of a parameter to be tuned or, alternatively, a quantity dependent upon the document length (to replace the variance). In this paper we revisit this ranking strategy by going back to its roots: mean and variance. For each retrieved document, we infer a relevance distribution from a series of point-wise relevance estimations provided by a number of different systems. This is used to compute the mean and the variance of document relevance estimates. On the TREC Clueweb collection, we show that this approach improves the retrieval performances. This development could lead to new strategies to address the fusion of relevance estimates provided by different systems.
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|Item Type:||Conference Paper|
|Additional Information:||Book Subtitle:
33rd European Conference on IR Research, ECIR 2011, Dublin, Ireland, April 18-21, 2011. Proceedings
|Divisions:||Current > Institutes > Institute for Future Environments
Current > Schools > School of Information Systems
Current > QUT Faculties and Divisions > Science & Engineering Faculty
|Deposited On:||02 Jun 2014 02:55|
|Last Modified:||24 Jul 2014 00:23|
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