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Predicting Search Task Difficulty

Published: 13 April 2014 Publication History

Abstract

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 features derived from the user's interaction with the search engine as well as features derived from the user's level of interest in the task and level of prior knowledge in the task domain. In addition to user-interaction features used in prior work, we evaluate features generated from scroll and mouse-movement events on the SERP. In some situations, we may prefer a system that can predict search task difficulty early in the search session. To this end, we evaluate features in terms of whole-session evidence and first-round evidence, which excludes all interactions starting with the second query. Our results found that the most predictive features were different for whole-session vs.ï źfirst-round prediction, that mouseover features were effective for first-round prediction, and that level of interest and prior knowledge features did not improve performance.

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  1. Predicting Search Task Difficulty

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    Published In

    cover image Guide Proceedings
    ECIR 2014: Proceedings of the 36th European Conference on IR Research on Advances in Information Retrieval - Volume 8416
    April 2014
    826 pages
    ISBN:9783319060279
    • Editors:
    • Maarten Rijke,
    • Tom Kenter,
    • Arjen Vries,
    • Chengxiang Zhai,
    • Franciska Jong,
    • Kira Radinsky,
    • Katja Hofmann

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    Springer-Verlag

    Berlin, Heidelberg

    Publication History

    Published: 13 April 2014

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