Comparing Graphs and Trees for Adaptive Hypermedia Authoring An experimental setup using the new version of the TANGOW Adaptive Hypermedia System

A key decision in designing authoring tools for Adaptive Hypermedia is the type of representation to use when authoring the relationships among contents. This paper describes an experiment that compares two representations, one based on trees, another using clustered graphs for the same task. An effort has been made to isolate all other aspects of authoring from the comparison; the choice of trees vs. graphs should be the only difference between both editors, which have exactly the same capabilities and goals: to author courses for the new version of the adaptive educational hypermedia system TANGOW. Experimental results for a small survey using the described setup are included.