Evaluating the Effect of Open Student Models on Self- Assessment
In IJAIED
17 (2): "Special Issue (Part 1) "Open Learner Models: Research Questions" "
Publication information
Abstract
This paper discusses the simple open student models used in two of our constraint-based tutors, SQL-
Tutor and KERMIT, and their effects on self-assessment. The systems present a high-level abstraction of the
detailed information contained in the student model, in terms of skill meters representing the student's progress
on domain concepts. SQL-Tutor presents the open student model when the student requires it, or when selecting
new problems. KERMIT, on the other hand, continuously displays a high-level summary of the student's
progress, while more detailed information is available on request. Our results show that even simple open
student models can have important positive effects on learning and students' meta-cognitive skills. Students
appreciated having access to their models, and they felt this feature contributed to their understanding of the
domain. Performance of less able students becomes significantly better than that of their peers of similar abilities
without access to their models. We have also seen that open student models can help students learn to select
better problems.
Keywords. Open student models, constraint-based tutors, meta-cognitive skills
