This paper deals with the design of interactivity in visualization tools. There are several factors that can be used to guide the analysis and design of the interactivity of these tools. One such factor is flow, which is concerned with the duration of interaction with visual representations of information--interaction being the actions performed…

This article provides an empirical evaluation of an indexing technology, topic maps (ISO 13250), in the context of an academic task in a higher education context. Topic maps are a form of indexing that define and display the interrelationships between various topics in a given domain, as well as anchor these topics to specific resources that help…

Reports on preservice teachers' use of a concept-mapping tool to create/modify concept maps about science-related elementary curriculum-content knowledge. Data from interviews, journals, and analysis of the concept maps showed how the preservice teachers used the tool to construct their curriculum-content knowledge in the form of more powerful…