1. NH McNevin, PhD, is Assistant Professor, Department of Physical Therapy, Wayne State University, 1400 Chrysler Blvd, Detroit, MI 48202 (USA), and Research Associate, Rehabilitation Institute of Michigan.
2. G Wulf, PhD, was Senior Researcher, Max-Planck Institute for Psychological Research, Munich, Germany, at the time this article was written. Dr Wulf is currently with the Department of Psychology, University of Reading, Reading, Berkshire, United Kingdom
3. C Carlson, PT, MA, is Assistant Professor, Department of Physical Therapy, Wayne State University