Analyzing and modeling users' online search behaviors when conducting exploratory search tasks could be instrumental in discovering search behavior patterns that can then be leveraged to assist users in reaching their search task goals. In this dissertation, we propose a framework for evaluating exploratory search based on implicit features and user search action sequences extracted from the transactional log data to model different aspects of exploratory search namely, uncertainty, creativity, exploration, and knowledge discovery. We show the e ectiveness of the proposed framework by demonstrating how it can be used to understand and evaluate user search performance to identify struggling and non-struggling users. Major contributions of this dissertation are three-fold. We show that we can e ectively model user search behavior using implicit features to predict the user's future performance level with high accuracy when conducting exploratory search tasks. We also provide a recommendation approach to assist struggling users by recommending them better search paths in order to improve their search performance and reach the task goal. Further, using simulations we demonstrate that our search process based recommendations improve the search performance of struggling users over time and validate these ndings using both qualitative and quantitative approaches. We also exhibit that the recommended search trail order matters and it outperforms the random order of search trails and would bene t the struggling users using search trail order evaluation metrics.
Subject (authority = RUETD)
Topic
Computer Science
Subject (authority = ETD-LCSH)
Topic
Human-computer interaction
Subject (authority = ETD-LCSH)
Topic
Information behavior
RelatedItem (type = host)
TitleInfo
Title
Rutgers University Electronic Theses and Dissertations
Identifier (type = RULIB)
ETD
Identifier
ETD_6951
PhysicalDescription
Form (authority = gmd)
electronic resource
InternetMediaType
application/pdf
InternetMediaType
text/xml
Extent
1 online resource (xiv, 105 p. : ill.)
Note (type = degree)
Ph.D.
Note (type = bibliography)
Includes bibliographical references
Note (type = statement of responsibility)
by Chathra Hasini Hendahewa
RelatedItem (type = host)
TitleInfo
Title
Graduate School - New Brunswick Electronic Theses and Dissertations
Identifier (type = local)
rucore19991600001
Location
PhysicalLocation (authority = marcorg); (displayLabel = Rutgers, The State University of New Jersey)
Rutgers University. Graduate School - New Brunswick
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Type
License
Name
Author Agreement License
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