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Webis at the TREC 2012 Session Track
BAUHAUS UNIV WEIMAR (GERMANY)
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In this paper we give a brief overview of the Webis groups participation in the TREC 2012 Session track. Our runs focus on three research questions 1 distinguishing low risk sessions where we want to involve session knowledge from those where we dont, 2 examining conservative query expansion only few expansion terms based on keywords from previous queries and seenclicked documentstitlessnippets, and 3 incorporating knowledge from other users similar sessions. Altogether, especially similar sessions seem to help improving retrieval performance in our experiments.
APPROVED FOR PUBLIC RELEASE