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How often is the task performed? The frequency with which existing notes are modified would depend on the subject of the notes: for instance, notes on a current event might be updated to reflect new developments, whereas notes on a historical event are unlikely to be modified as much. Review of notes tends to happen in specific situations such as looking up information that is needed for a pset, or reviewing all notes in preparation for a test.
What are the time or resource constraints? The logistics of reviewing notes (locating notes, locating the relevant section in the notes) should not add much to the time necessary for absorbing the information itself. Students told us that they already do not allocate sufficient time to study for tests, so any solution that added unnecessary overhead would not be favoredused.
How is the task learned? On paper, reviewing and modifying notes is learned intuitively, or by watching others at an early age. On a computer, the tools necessary to review or modify notes should be easy to learn from exploring the interface, or from familiarity with external software metaphors.
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Who else is involved in the task? People might wish to review and/or modify notes taken by others. For the most part, though, only one user is involved.