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Creating Virtual-hand and Virtual-face Illusions to Investigate Self-representation
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Using Fitts' Law to Detect Intentional Misrepresentation.

Rebecca L Deuble1, Mark J Connick1, Emma M Beckman1

  • 1a School of Human Movement and Nutrition Sciences, University of Queensland , Brisbane , Australia.

Journal of Motor Behavior
|July 17, 2015
PubMed
Summary

Intentional misrepresentation of impairment in Paralympic classification can be detected. Evaluating conformity with Fitts

Keywords:
cheatingcoordinationevidence-based classificationfinger tappingparalympic sport

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Area of Science:

  • Sports Science
  • Biomechanics
  • Paralympic Classification

Background:

  • Paralympic classification relies on coordination tests susceptible to intentional misrepresentation (IM) of impairment severity.
  • Reciprocal tapping tasks are commonly used but can be influenced by effort levels.
  • Objective methods are needed to ensure fair classification and prevent deliberate exaggeration of impairment.

Purpose of the Study:

  • To determine if submaximal reciprocal tapping tasks can be distinguished from maximal voluntary effort (MVE) tasks.
  • To assess the validity of Fitts' law conformity as a method for detecting IM in tapping tasks.

Main Methods:

  • Ten non-disabled participants performed reciprocal tapping tasks with their dominant hand.
  • Tasks were performed under two conditions: maximal voluntary effort (MVE) and submaximal effort (at least 20% slower than MVE).
  • Conformity with Fitts' law was analyzed for both conditions.

Main Results:

  • Differences in conformity with Fitts' law were observed between submaximal and maximal effort tapping tasks.
  • This suggests that Fitts' law can differentiate between genuine and misrepresented effort levels.
  • The findings indicate a potential objective method for detecting intentional misrepresentation.

Conclusions:

  • Evaluating conformity with Fitts' law shows promise as an objective method to detect intentional misrepresentation in reciprocal tapping.
  • Further evaluation of the method's sensitivity and specificity is warranted for practical application in Paralympic classification.
  • This approach could enhance the integrity of Paralympic sports classification systems.