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Lecture Notes in Computer Science
A medium-scale user study was carried out to investigate the usability of a concept-based query expansion support tool. The tool was fully integrated into the interface of an IR system, and designed to support the user by offering automatically generated concept hierarchies. Two types of hierarchies were compared with a baseline. Several observations were made as a result of the study: 1) the hierarchy is often accessed after an examination of the first page of search results; 2) accessing thedoi:10.1007/978-3-540-24752-4_4 fatcat:yw7ifqtvhvdkfiahrgnhcyrwyy