Biomedical Engineering Reference
In-Depth Information
Figure 4.4. These graphs show the results of the checker-placing task for all the test
subjects. The bars show the percentage of the correctly placed checkers calculated with
Eq. 3 and the dashed line represents the linear regression of the time. Board Top 16 was
used only once at this stage of the experiment, so there is no standard deviation data
available and thus no error bar. The number of repetitions for the other boards varied from
test subject to test subject but was at least 3 times for every board and at the maximum
6 times (small numbers at the x-axis denote if there were more than three times and give
the number of times).
at the start, but a slight drop in correct percentage is seen for boards with
more white squares. This drop may be attributed to the increase in the number
of white squares per board as well as to their positions on the boards: With
more white squares on a board the squares were located more often at borders or
in corners of the board as well as diagonally adjacent to another (see Figure 4.10,
board designs). The regression time slopes show similar narrow intervals as in
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