| ASIS&T 2005
How the Overlap Between the Search Results of Different Retrieval Systems Correlates with Document Relevance
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This paper provides an analysis of the overlap between the search results of retrieval systems that partici¬pated in TREC 3, 6, 7 and 8 to provide empirical support for some of the key assump¬tions guiding the design of data fusion methods. It shows that the potential relevance of a document increases exponentially as the number of search methods retrieving it increases – called the Authority Effect. It also shows that documents higher up in ranked lists and found by more sys¬tems are more likely to be relevant – called the Ranking Effect. Both effects can help ex¬plain why major data fusion methods perform well.
this on the ASIS&T 2005 Annual Meeting wiki!