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eCAM Advance Access first published online on October 29, 2007
This version published online on December 3, 2007
eCAM, doi:10.1093/ecam/nem164
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© 2007 The Author(s).
This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/2.0/uk/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Commentary

Between-Groups Study Designs Demand Between-Groups Analyses: A Response to Hernandez-Reif, Shor-Posner, Baez, Soto, Mendoza, Castillo, Quintero, Perez, and Zhang

Christopher A. Moyer

University of Wisconsin-Stout

The most recent massage therapy (MT) study by Hernandez-Reif et al. displays flaws persistent in this area of research that are attributable to MT researchers’ frequent mistake of using within-group analyses of dependent variables in studies that are purported to be randomized control trials. This practise violates the logic of using randomization to create treatment and control groups, and thereby fails to control for the validity threats of spontaneous remission, placebo effects, and statistical regression. The result is that a clear understanding of what MT can and cannot do is seriously hampered.

Keywords: Massage – cortisol – methodology – randomized – control group

For reprints and all correspondence: Christopher A. Moyer, University of Wisconsin-Stout, Tel: 715-232-1621; Fax: 715-232-5303; E-mail: christopher.a.moyer{at}gmail.com

Received June 15, 2007; accepted September 19, 2007


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