When query expansion fails
- Bodo von Billerbeck
Proceedings of the 26th annual international ACM SIGIR conference on Research and development in informaion retrieval |
Published by ACM Press
The effectiveness of queries in information retrieval can be improved through query expansion. This technique automatically introduces additional query terms that are statistically likely to match documents on the intended topic. However, query expansion techniques rely on fixed parameters. Our investigation of the effect of varying these parameters shows that the strategy of using fixed values is questionable.