Document (#27886)

Author
Vakkari, P.
Sormunen, E.
Title
¬The influence of relevance levels an the effectiveness of interactive information retrieval
Source
Journal of the American Society for Information Science and Technology. 55(2004) no.11, S.963-969
Year
2004
Abstract
In this paper, we focus an the effect of graded relevance an the results of interactive information retrieval (IR) experiments based an assigned search tasks in a test collection. A group of 26 subjects searched for four Text REtrieval Conference (TREC) topics using automatic and interactive query expansion based an relevance feedback. The TREC- and user-suggested pools of relevant documents were reassessed an a four-level relevance scale. The results show that the users could identify nearly all highly relevant documents and about half of the marginal ones. Users also selected a fair number of irrelevant documents for query expansion. The findings suggest that the effectiveness of query expansion is closely related to the searchers' success in retrieving and identifying highly relevant documents for feedback. The implications of the results an interpreting the findings of past experiments with liberal relevance thresholds are also discussed.
Theme
Retrievalstudien
Object
TREC

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