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Chapter and Conference Paper
The Effects of Search Task Determinability on Search Behavior
Among the many task characteristics that influence search behaviors and outcomes, task complexity has received considerable attention. One view of task complexity is through the lens of a priori determinability—a...
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Chapter and Conference Paper
Using Query Performance Predictors to Reduce Spoken Queries
The goal of query performance prediction is to estimate a query’s retrieval effectiveness without user feedback. Past research has investigated the usefulness of query performance predictors for the task of re...
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Chapter and Conference Paper
Using Query Performance Predictors to Improve Spoken Queries
Query performance predictors estimate a query’s retrieval effectiveness without user feedback. We evaluate the usefulness of pre- and post-retrieval performance predictors for two tasks associated with speech-...
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Chapter and Conference Paper
Improving Aggregated Search Coherence
Aggregated search is that task of blending results from different search services, or verticals, into the core web results. Aggregated search coherence is the extent to which results from different sources focus ...
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Chapter and Conference Paper
Predicting Search Task Difficulty
Search task difficulty refers to a user’s assessment about the amount of effort required to complete a search task. Our goal in this work is to learn predictive models of search task difficulty. We evaluate fe...
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Chapter and Conference Paper
A Methodology for Evaluating Aggregated Search Results
Aggregated search is the task of incorporating results from different specialized search services, or verticals, into Web search results. While most prior work focuses on deciding which verticals to present, the ...