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The Influence of Visual Feedback and Prior Knowledge About Feedback on Vertical Aiming Strategies

Elliott, D and Dutoy, C and Andrew, M and Burkitt, JJ and Grierson, LEM and Lyons, JL and Hayes, SJ and Bennett, SJ (2014) The Influence of Visual Feedback and Prior Knowledge About Feedback on Vertical Aiming Strategies. JOURNAL OF MOTOR BEHAVIOR, 46 (6). pp. 433-443. ISSN 0022-2895

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Abstract

Two experiments were conducted to examine time and energy optimization strategies for movements made with and against gravity. In Experiment 1, we manipulated concurrent visual feedback, and knowledge about feedback. When vision was eliminated upon movement initiation, participants exhibited greater undershooting, both with their primary submovement and their final endpoint, than when vision was available. When aiming downward, participants were more likely to terminate their aiming following the primary submovement or complete a lower amplitude corrective submovement. This strategy reduced the frequency of energy-consuming corrections against gravity. In Experiment 2, we eliminated vision of the hand and the target at the end of the movement. This procedure was expected to have its greatest impact under no vision conditions where no visual feedback was available for subsequent planning. As anticipated, direction and concurrent visual feedback had a profound impact on endpoint bias. Participants exhibited pronounced undershooting when aiming downward and without vision. Differences in undershooting between vision and no vision were greater under blocked feedback conditions. When performers were uncertain about the impending feedback, they planned their movements for the worst-case scenario. Thus movement planning considers the variability in execution, and avoids outcomes that require time and energy to correct.

Item Type: Article
Additional Information: This is an Accepted Manuscript of an article published by Taylor & Francis in Journal of Motor Behavior on 10 September 2014, available online: http://dx.doi.org/10.1080/00222895.2014.933767
Uncontrolled Keywords: 1106 Human Movement And Sports Science
Subjects: R Medicine > RC Internal medicine > RC1200 Sports Medicine
Divisions: Sport & Exercise Sciences
Publisher: ROUTLEDGE JOURNALS, TAYLOR & FRANCIS LTD
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Date Deposited: 26 Oct 2015 12:14
Last Modified: 26 Oct 2015 12:14
DOI or Identification number: 10.1080/00222895.2014.933767
URI: http://researchonline.ljmu.ac.uk/id/eprint/1451

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