PHYS THER
Vol. 89, No. 3, March 2009, pp. e5-e6
DOI: 10.2522/ptj.2009.89.3.e5
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Editorials

"Just the Facts, Ma’am": If It Were Only That Simple, Joe

James C (Cole) Galloway

JC Galloway, PT, PhD, is Editorial Board Member, Department of Physical Therapy, University of Delaware, Newark, DE 19716


Because this article has no abstract, we have provided an extract of the full text and any section headings.

Change is in the air. Climate change, economic change, political change. In this month's issue of PTJ, we read that even our view of "variability" itself is changing. Specifically, Regina Harbourne and Nicholas Stergiou in "Movement Variability and the Use of Nonlinear Tools: Principles to Guide Physical Therapist Practice"1 argue that nonlinear measures, such as the Lyapunov exponent and approximate entropy, can reveal the "hidden structure" within the variability of data over time. These methods were developed to handle complexity and, thus, often fit well with rehabilitation research. They are, however, a bit complex themselves. To assist readers like me, the authors provide an appendix of jargon . . . [Full Text of this Article]


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