Reflections on "Aboutness" TREC-9 Evaluation Experiments at Justsystem.
Sumio Fujita · Text REtrieval Conference · 2000
TREC-9 evaluation experiments at the Justsystem site are described with a focus on “aboutness” based approach in text retrieval. Experiments on the effects of supplemental noun phrase indexing, pseudo-relevance feedback and reference database feedback in view of the effect of various length of queries are reported. The results show that pesudo-relevance feedback is always effective while reference database feedback is effective only with very short queries. We reconfirmed that supplemental phrasal indexing is more effective with longer queries.