Mr Osborn is Associate Professor, Department of Physical Therapy, University of South Dakota, 414 E Clark St, Vermillion, SD 57069-2390. Address all correspondence to Mr Osborn. Dr Tentinger is Assistant Professor, Division of Technology for Training and Development, University of South Dakota, Vermillion, SD 57069. Received March 6, 2002, and accepted January 31, 2003.
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Osborn et al. (2003) studied this question.