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. Author manuscript; available in PMC: 2008 Aug 1.
Published in final edited form as: Hum Mov Sci. 2007 Jul 5;26(4):555–589. doi: 10.1016/j.humov.2007.05.003

Fig. 2.

Fig. 2

Detrended fluctuation analysis (DFA) applied to time series of stride time from a healthy young adult. The slope of the line relating the size of the fluctuations to the window size, n, is defined as the fractal scaling exponent, a. For this participant, the slope is .83, indicating long-range, fractal correlations in the original data. When the data is randomly re-ordered (shuffled), the slope becomes .5, reflecting white noise and an absence of fractal scaling. Adapted from Hausdorff, Peng et al. (1995).