Information Technology Reference
In-Depth Information
Fig. 5.6
A LED (within the
red circle) lights up when the
pen taps on a printed button
and provides visual feedback
on the selection
different groups. Content with group visibility is shared with the members of all
groups of this user that apply to the given context.
•
Public visibility
: The content is visible to all users in this given context (e.g. all
students attending this lecture, all participants of the meeting series etc.).
Moreover, defining visibility is optional, allowing the user to maintain a natural
annotation style. If no visibility is chosen, the default level defined by the user is set.
This reduces extraneous cognitive load during the annotation process. Results from
semi-structured interviews that we conducted during our evaluation studies indicate
that a very appropriate default level is the group level. With respect to privacy, it is
typically not considered critical to share annotations with other members of the own
group, as these are personally selected by the user. With this default level, only a
small number of annotations that contain private information or that shall be visible
to all users must be explicitly classified with a visibility level.
5.3 Visualization of Shared Annotations
Accessing annotations that were shared by other users can support understanding of
documents:
Scenario 9 (Thoughts of other Persons)
Sally has not well understood a particu-
lar issue. Reading the annotations of other persons helps her in getting the point.
In another course, a controversial topic was discussed. She is interested in what the
other students think of this point and reads their annotations.
