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i-com

Journal of Interactive Media

Editor-in-Chief: Ziegler, Jürgen

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2196-6826
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Volume 16, Issue 1 (Apr 2017)

Issues

Orientation and Navigation Support in Resource Spaces Using Hierarchical Visualizations

Sebastian Gross / Marcel Kliemannel / Niels Pinkwart
Published Online: 2017-04-05 | DOI: https://doi.org/10.1515/icom-2016-0043

Abstract

In this article we investigate how orientation and navigation in (extensive) spaces consisting of digital resources can be supported by using hierarchical visualizations. Such spaces can consist of heterogeneous sets of digital resources as for instance articles from Wikipedia, textbooks, and videos. Due to easier access to digital resources in the Internet age, a manual exploration of these spaces might lead to information overload. As a result, techniques need to be developed in order to automatically analyze and structure sets of resources. We introduce a prototypical implementation of a visualization pipeline that extracts information dimensions from resources in order to group them into semantically similar clusters, and visualizes these clusters using two different visualizations: a treemap visualizing clusters and nested subclusters, and a rooted tree visualizing groups of semantically similar resources as subtrees. In a lab study we evaluated the two visualizations and compared them to two control groups. The results may hint to users’ better understanding of the resources’ underlying knowledge as compared to using typical approaches (e.g. web search results as list) when using hierarchical visualizations.

Keywords: Visualization; Resource Space

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About the article

Sebastian Gross

Sebastian Gross received his Diploma degree in Business Information Systems from Clausthal University of Technology. He joined the research group ‘Human-Centered Information Systems’ headed by Prof. Pinkwart in October 2011. In July 2013, he followed Prof. Pinkwart to Humboldt-Universität zu Berlin where he works in the research project ‘Learning dynamic feedback in intelligent tutoring systems’ (DynaFIT).

Marcel Kliemannel

Marcel Kliemannel studied computer science at Humboldt-Universität zu Berlin, and graduated in 2016. In his Master’s thesis he investigated techniques for visualizing knowledge spaces and strategies for supporting navigation in multi-dimensional visualizations.

Niels Pinkwart

Niels Pinkwart studied Computer Science and Mathematics at the University of Duisburg-Essen, where he also completed his PhD in 2005. Since 2013, he is Professor at Humboldt-Universität zu Berlin where he heads a research group which investigates Computer Science in Education and Society.


Published Online: 2017-04-05

Published in Print: 2017-04-01


Funding Source: Deutsche Forschungsgemeinschaft

Award identifier / Grant number: PI 764/6-2

This work was supported by the Deutsche Forschungsgemeinschaft (DFG) under the grant “DynaFIT – Learning Dynamic Feedback in Intelligent Tutoring Systems” (PI 764/6-2).


Citation Information: i-com, ISSN (Online) 2196-6826, ISSN (Print) 1618-162X, DOI: https://doi.org/10.1515/icom-2016-0043.

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