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The X-RTS FCE is based, in part, on our 2002 article
published in the Journal of Hand Therapy. The abstract for
that study is at the bottom of this page.
In 2010 additional studies associated with
our testing system were published. Four studies related to the
assessment of function and validity of effort can be downloaded by
clicking on the text in this sentence. A pre-publication copy
of our "Accuracy of Visual Estimation of Effort during a Lifting Task"
study is also in this Zip file, along with two published but not
peer-reviewed articles.
| Schapmire
D, St. James JD, Townsend R, Stewart T, Delheimer S, Focht D,
Simultaneous Bilateral Testing:
Validation of a New Protocol to Detect Insincere Effort During
Grip and Pinch Strength Testing,
Journal of Hand Therapy,
Volume 15, Number 3, July-September 2002, pgs. 242-250.
Abstract: The
detection of feigned weakness in hand-grip strength assessment is
difficult. We review several proposed methods and their
weaknesses. A comparison of unilateral testing and simultaneous
bilateral testing with the Jamar dynamometer and the Baseline™
pinch gauge is demonstrated as a solution. An experiment employed
100 asymptomatic subjects tested twice, once under instructions to
give a full effort and once under instructions to feign weakness.
Seven statistical criteria of noncompliance were chosen. Defining
noncompliance as failing two or more of the seven criteria, 99% of
the instructed-noncompliant subjects were correctly classified as
noncompliant. No subjects were incorrectly classified as
noncompliant during instructed compliant testing. Twelve subjects
failed a single criterion. On retesting, all but one were
correctly classified. One subject in the instructed-noncompliant
group passed all criteria. Including retesting of the 12
"grey-zone" subjects,
accuracy was
99.5%. |
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X-RTS Software
Products and Testing Devices
James D. St. James, Ph.D. and Darrell Schapmire, M.S.
P.O. Box 171, 128 Madison Street
Hopedale, IL 61747
Phone: (309) 449-5483 Fax: (309) 449-6218
ds@xrts.com
Site Copyright 2009
©.
Intellectual property theft is a federal offense having both civil
and criminal consequences.
The X-RTS Hand Strength Assessment software and database
are protected by US Copyright. The X-RTS devices are
protected by registered patents. X-RTS ® is a
registered trademark.
Intellectual
property rights for this site are insured to provide a mechanism to
challenge infringement of the trademark, copyrights, patents and all
written and digital information associated with this site.
Theft or unauthorized use, reproduction or distribution of the
products or information on the pages of this site will be considered
as a violation of the intellectual property rights of the site
owners.
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