139603.fig.006a
(a) Average time (in seconds) used to find labels
139603.fig.006b
(b) Average number of assertions
Figure 6: Comparison results of the conducted usability study with the three versions of the stacked graph visualization. Two different values for TLV (threshold for label visibility) are used in the three versions, as well as our proposed stacked graph with automatic label layout on unused space. The comparison among versions are shown for each view prefix.