They point out that tutoring and training artefacts should be both interactive and articulate. Interactive means that the actions of a learner affect, and to some extent determine, the trajectory that the tutoring artefact follows in presenting the course material. Articulated means that the tutoring artefact is capable of knowledge communication with a learner about the subject matter. Both angles put forward many fundamental research questions. Qualitative Reasoning Qualitative reasoning is an important area of research within the field of artificial intelligence.
Qualitative models are essential for constructing articulate tutoring artefacts.
However, there are still many problems that must be solved. First, the reasoning capability of qualitative techniques is limited and as such does not always allow one to construct the appropriate model. Second, the construction of a qualitative model in itself is difficult, and needs to be supported. Third, being the basis of an articulate tutoring artefact requires more reasoning strategies that 'just' errorless prediction of correct behaviour. Each of these problems triggers many research questions.