Scientific Reports (Jul 2017)

Training-induced dynamics of accuracy and precision in human motor control

  • Abhishek Kumar,
  • Yuto Tanaka,
  • Anastasios Grigoriadis,
  • Joannis Grigoriadis,
  • Mats Trulsson,
  • Peter Svensson

DOI
https://doi.org/10.1038/s41598-017-07078-y
Journal volume & issue
Vol. 7, no. 1
pp. 1 – 10

Abstract

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Abstract The study investigated the dynamic changes in accuracy and precision during a simple oral and digital motor task involving a controlled and a ballistic force. Eighteen healthy participants participated in four experimental sessions during which they performed one hundred trials of targeting a controlled (low/high hold force) and a ballistic force during an oral and a digital motor task (OMT and DMT). Accuracy and precision across one hundred trials were calculated and subjected to segmented linear regression analysis. Repeated performance of controlled forces show a significant dynamic change in accuracy during initial stage of targeting high hold forces during OMT and a significant dynamic change in both accuracy and precision during final stage of targeting high hold forces during DMT. Repeated performance of ballistic force showed a significant dynamic change in both accuracy and precision during final stage of targeting high hold force forces during OMT and a significant dynamic change in accuracy during the initial stages of targeting high hold force during the DMT. The findings indicate a subtle degree of dissociation between accuracy and precision in terms of dynamic modulation of forces due to repeated performance of both OMT and DMT.