Pragmatic evaluation of folksonomies
Proceedings of the 20th international conference on World wide web
The effects of navigation tools on the navigability of web-based information systems
i-KNOW '11 Proceedings of the 11th International Conference on Knowledge Management and Knowledge Technologies
Building directories for social tagging systems
Proceedings of the 20th ACM international conference on Information and knowledge management
A user profile modelling using social annotations: a survey
Proceedings of the 21st international conference companion on World Wide Web
Evaluating tag-based information access in image collections
Proceedings of the 23rd ACM conference on Hypertext and social media
Evaluation of Folksonomy Induction Algorithms
ACM Transactions on Intelligent Systems and Technology (TIST)
Web Semantics: Science, Services and Agents on the World Wide Web
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It is a widely held belief among designers of social tagging systems that tag clouds represent a useful tool for navigation. This is evident in, for example, the increasing number of tagging systems offering tag clouds for navigational purposes, which hints towards an implicit assumption that tag clouds support efficient navigation. In this paper, we examine and test this assumption from a network-theoretic perspective, and show that in many cases it does not hold. We first model navigation in tagging systems as a bipartite graph of tags and resources and then simulate the navigation process in such a graph. We use network-theoretic properties to analyse the navigability of three tagging datasets with regard to different user interface restrictions imposed by tag clouds. Our results confirm that tag resource networks have efficient navigation properties in theory, but they also show that popular user interface decisions (such as “pagination” combined with reverse-chronological listing of resources) significantly impair the potential of tag clouds as a useful tool for navigation. Based on our findings, we identify a number of avenues for further research and the design of novel tag cloud construction algorithms. Our work is relevant for researchers interested in navigability of emergent hypertext structures, and for engineers seeking to improve the navigability of social tagging systems.