User interface specification issues for computerized educational systems

Aside from the great progress in the field of human-computer interaction, particularly in the last few years the need for the development of adaptive user interfaces in several application areas has been recognized. Our research is concentrated on intelligent tutoring systems, a generation of computerized educational systems that attempt to mimic the capabilities of a human tutor. We elaborate how the case of the interface of the Adaptive Knowledge Base Builder, intended for the development of an arbitrary domain knowledge base, can support the above reasoning. In order to specify its design and behaviour User Action Notation is advocated as a suitable method.