Statistical Analysis
Kruskal-Wallis (KW) or Wilcoxon
signed rank tests were used to compare the two subject groups. The KW
test checks if the mean ranks across the groups are same. Under the
special case where the data distribution in each group has similar
shape, the test can be interpreted as comparing the medians. Similarly,
the WSR test checks if the median of the differences between the paired
samples approaches zero. This becomes a comparison of medians in a
scenario wherein the relative positions of the samples in both the
distributions with respect to the median are similar. In cases where
these tests were used multiple times within a plot (for example, in
Figure 2-5c), we did not correct for multiple comparisons as the number
of bins under consideration were chosen arbitrarily.