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Blake Anderson


Publications by Blake Anderson (bibliography)

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Guo, Qi, White, Ryen W., Zhang, Yunqiao, Anderson, Blake and Dumais, Susan T. (2011): Why searchers switch: understanding and predicting engine switching rationales. In: Proceedings of the 34th Annual International ACM SIGIR Conference on Research and Development in Information Retrieval 2011. pp. 335-344. http://dx.doi.org/10.1145/2009916.2009964

Search engine switching is the voluntary transition between Web search engines. Engine switching can occur for a number of reasons, including user dissatisfaction with search results, a desire for broader topic coverage or verification, user preferences, or even unintentionally. An improved understanding of switching rationales allows search providers to tailor the search experience according to the different causes. In this paper we study the reasons behind search engine switching within a session. We address the challenge of identifying switching rationales by designing and implementing client-side instrumentation to acquire in-situ feedbacks from users. Using this feedback, we investigate in detail the reasons that users switch engines within a session. We also study the relationship between implicit behavioral signals and the switching causes, and develop and evaluate models to predict the reasons for switching. In addition, we collect editorial judgments of switching rationales by third-party judges and show that we can recover switching causes a posteriori. Our findings provide valuable insights into why users switch search engines in a session and demonstrate the relationship between search behavior and switching motivations. The findings also reveal sufficient behavioral consistency to afford accurate prediction of switching rationale, which can be used to dynamically adapt the search experience and derive more accurate competitive metrics.

© All rights reserved Guo et al. and/or ACM Press

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Wang, Xin, Erdelez, Sanda, Alen, Carla, Anderson, Blake, Cao, Hongfei and Shyu, Chi-Ren (2011): Medical image describing behavior: a comparison between an expert and novice. In: Proceedings of the 2011 iConference 2011. pp. 792-793. http://dx.doi.org/10.1145/1940761.1940907

This preliminary study, as a part of a broader study about the medical image use by experts and novices, examines the differences in image describing behavior between these two categories of users. Eye tracking technique was used to capture the image users' eye movement on the Area of Interests (AOIs). This study found that a domain expert was capable of employing nine levels of image attributes in the descriptions, while a novice was able to use only six levels. Furthermore, the expert showed stronger capability in expressing the image information needs by generating more image attributes in the descriptions than the novice, especially in terms of employing significantly more high-level (semantic levels) image attributes. We also found that the novice attended to more AOIs on every image than the expert.

© All rights reserved Wang et al. and/or ACM Press

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