Term-weighting approaches in automatic text retrieval
Information Processing and Management: an International Journal
Refining the test phase of usability evaluation: how many subjects is enough?
Human Factors - Special issue: measurement in human factors
Human performance engineering (3rd ed.): designing high quality professional user interfaces for computer products, applications and systems
Visualization of search results: a comparative evaluation of text, 2D, and 3D interfaces
Proceedings of the 22nd annual international ACM SIGIR conference on Research and development in information retrieval
A vector space model for automatic indexing
Communications of the ACM
Handbook of Human-Computer Interaction
Handbook of Human-Computer Interaction
A Practical Guide to Usability Testing
A Practical Guide to Usability Testing
3D Visualization of Text Collections: An Experimental Study to Assess the Usefulness of 3D
IV '04 Proceedings of the Information Visualisation, Eighth International Conference
INFOVIS '04 Proceedings of the IEEE Symposium on Information Visualization
Visualising Knowledge Maps for Encyclopedia Articles
IV '05 Proceedings of the Ninth International Conference on Information Visualisation
Geospatial Anchoring of Encyclopedia Articles
IV '06 Proceedings of the conference on Information Visualization
Knowledge and Information Visualization
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Modern digital encyclopedias contain hundreds of thousands of textual articles and multimedia elements. Alternative discovery techniques facilitating the visual exploration of encyclopedia knowledge spaces have recently received much attention. We present the results of a comparative usability evaluation of a two-dimensional and a three-dimensional visualization system integrated with the Brockhaus encyclopedia. Both systems enable visual navigation of article context. Results indicate that both systems perform comparably and that users prefer the threedimensional visualization system.