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Example of statistical comparison between two multiscale systems. In case 2.a the behavior is statistically different from 1 at scale s2 because the intrinsic levels of activity at this scale have been increased. However, in case 2.b the statistical differences respect to 1 at scale x2 is not due to any intrinsic change in x2 but instead to a change in the relation between x2 and x1, that now presents a phase modulation from slower to fastest frequencies.
