Query performance predictors estimate a query’s retrieval effectiveness without user feedback. We evaluate the usefulness of preand post-retrieval performance predictors for two tasks associated with speech-enabled search: (1) predicting the most effective query transcription from the recognition system’s n-best hypotheses and (2) predicting when to ask the user for a spoken query reformulation. We use machine learning to combine a wide range of query performance predictors as features and evaluate on 5,000 spoken queries collected using a crowdsourced study. Our results suggest that pre-and post-retrieval features are useful for both tasks, and that post-retrieval features are slightly better.
CITATION STYLE
Arguello, J., Avula, S., & Diaz, F. (2016). Using query performance predictors to improve spoken queries. In Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) (Vol. 9626, pp. 309–321). Springer Verlag. https://doi.org/10.1007/978-3-319-30671-1_23
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