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• W2588232939 abstract "We study relevance judgment and user activities in a search session. We focus on ephemeral relevance—a contextual measurement regarding the amount of useful information a searcher acquired from a clicked result at a particular time—and two primary types of search activities—query reformulation and click. The purpose of the study is both explanatory and practical. First, we examine the influence of different factors on ephemeral relevance and user activities in a search session. Second, we leverage short-term search history and implicit feedback in a session to predict ephemeral relevance and future search activities. The main findings include:1. As a contextual usefulness measurement, ephemeral relevance differs from both topical relevance judgment and context-independent usefulness assessment. We show ephemeral relevance significantly relates to a wide range of factors, including topical relevance, novelty, understandability, reliability, effort spent, and search task. The difference between ephemeral relevance and context-independent usefulness assessment is linked to judgment criteria, novelty, effort spent, and changes in user’s perceptions of a search result.2. Ephemeral relevance can be predicted accurately using implicit feedback signals without any manual explicit judgments. We generalize existing implicit feedback methods from using information related to a single result to those based on user activities in a whole session, achieving a correlation as high as 0.5 between the predicted and real judgments.3. We show choices of word changes in query reformulation and click decisions significantly relate to recent search history, such as the contents and effectiveness of previous search queries, the contents of the results viewed and clicked in previous searches, etc.4. Leveraging short-term search history in a session and other information, we can predict word changes in query reformulation and click decisions with different levels of accuracies.These findings help disclose and explain the dynamics of relevance and user activities in a search session. The developed techniques provide effective support for developing interactive IR systems." @default.
• W2588232939 created "2017-02-24" @default.
• W2588232939 creator A5019675617 @default.
• W2588232939 date "2017-01-24" @default.
• W2588232939 modified "2023-09-27" @default.
• W2588232939 title "Ephemeral relevance and user activities in a search session" @default.
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