Interactive Information Visualization methods engage users in
exploratory behavior. Detailed information about such processes
can help developers to improve the design of such methods. The
following study which is based on software logging describes
patterns of such behavior in more detail. Subjects in our study
engaged in some activities (e.g. adding data, changing form of
visualization) significantly more than in others. They adapted
their activity patterns to different tasks, but not fundamentally so.
In addition, subjects adopted very systematic sequences of
actions. These sequences were quite similar across the whole
sample, thus indicating that such sequences might reflect specific
problem solving behavior. Davidson´s  framework of problem
solving behavior is used to interpret the results. More research is
necessary to show whether similar interaction patterns can be
found for the usage of other InfoVis methodologies as well.