The interaction history of a document can be modelled as a tree of command objects. This model does not only support recovery (undo/redo), but is also suitable for cooperation betw...
Activity spaces are usually task-specific and only common to a group of people who work together in a certain application domain. It is desirable to enable users to define and mod...
The field of intelligent tutoring systems has been using the well known knowledge tracing model, popularized by Corbett and Anderson (1995) to track individual users’ knowledge f...
—The main goal of this work is to propose a method to evaluate user interfaces using task models and logs generated from a user test of an application. The method can be incorpor...
In User Centred Design, the integration of knowledge of users work practice, preferences etc. into the design process is crucial to success. For this reason, video recording has b...