Peter Brusilovsky
Riccardo Rizzo
ABSTRACT
This paper discusses the problem of horizontal (non-hierarchical) navigation in modern educational courseware. We will look at why horizontal links disappear, how to support horizontal navigation in modern hyper-courseware, and our earlier attempts to provide horizontal navigation in Web-based electronic textbooks. Here, we present map-based navigation - a new approach to support horizontal navigation in open corpus educational courseware that we are currently investigating. We will describe the mechanism behind this approach, present a system KnowledgeSea that implements this approach, and provide some results of a classroom study of this system.
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Index Terms
- Map-based horizontal navigation in educational Hypertext
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Reviews
Mordechai Ben-Menachem
A study of hypertext usage for education and for authoring educational content is presented in this paper. Some paradigms are described with examples, and some analysis is presented. The authors attempt to show that in hypertext, and hypertext tools used for educational purposes, the idea of horizontal links is nearly unknown. It is difficult to understand the purpose of limiting the research scope so strictly and artificially. Hypertext use has been shown in many areas [1,2,3]. These use horizontal, as well as vertical, links. The second page states: Courseware is created from reusable content objects that can be produced by different authors. In this context, authoring of "hardwired" links between pages and other educational objects becomes simply impossible since every object could be re-used outside its original context where these links have no original destination. One of the oldest techniques in computer science and software engineering is the dynamic linker. From this description, there is no apparent reason why this technology cannot be profitably applied. The authors seem to assume an entire hypertext world designed around Hypertext Markup Language (HTML). This is not realistic. Hypertexts are designed in pages, frames, slides, and other forms. The authors claim to have invented map-based hypertext. Both Amitay [1] and Brown [3] show map-based or map-like techniques for navigation, using a commonly understood concept of what a map of this might be. The paper clearly shows some expertise, but would have benefited from tighter reviewing and editing, which would have improved its readability. More importantly, I question the research technique and the authors' scoping of the paper. I am afraid I cannot strongly recommend this paper to hypertext researchers, as the authors do not seem to have done their homework well. Online Computing Reviews Service
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