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ECIR
2008
Springer

Discounted Cumulated Gain Based Evaluation of Multiple-Query IR Sessions

8 years 3 months ago
Discounted Cumulated Gain Based Evaluation of Multiple-Query IR Sessions
IR research has a strong tradition of laboratory evaluation of systems. Such research is based on test collections, pre-defined test topics, and standard evaluation metrics. While recent research has emphasized the user viewpoint by proposing user-based metrics and non-binary relevance assessments, the methods are insufficient for truly user-based evaluation. The common assumption of a single query per topic and session poorly represents real life. On the other hand, one well-known metric for multiple queries per session, instance recall, does not capture early (within session) retrieval of (highly) relevant documents. We propose an extension to the Discounted Cumulated Gain (DCG) metric, the Session-based DCG (sDCG) metric for evaluation scenarios involving multiple query sessions, graded relevance assessments, and open-ended user effort including decisions to stop searching. The sDCG metric discounts relevant results from later queries within a session. We exemplify the sDCG metric w...
Kalervo Järvelin, Susan L. Price, Lois M. L.
Added 29 Oct 2010
Updated 29 Oct 2010
Type Conference
Year 2008
Where ECIR
Authors Kalervo Järvelin, Susan L. Price, Lois M. L. Delcambre, Marianne Lykke Nielsen
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