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Evaluation of ISIS Tutor (repetitions)

Notes:

This diagram shows that the adaptive annotation and removal techniques result in a significant reduction of the number of repeat visits to pages. This is not surprising: when users get no advice they go to pages that are not yet appropriate. They go back and continue learning and later revisit the page to study it when appropriate.
The adaptive annotations give guidance that is clearly followed by the students. They study pages at the right time and thus have no need to revisit them later.