The impact of strategic trajectory optimization on illusory target biases during goal-directed aiming

Roberts, James W. and Burkitt, James J. and Elliott, Digby and Lyons, James L. (2016) The impact of strategic trajectory optimization on illusory target biases during goal-directed aiming. Journal of Motor Behavior, 48 (6). pp. 542-551. ISSN 0022-2895

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Strategic bias+Control_Roberts, Burkitt et al..doc - Accepted Version

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Official URL: http://www.tandfonline.com/doi/full/10.1080/002228...

Abstract

During rapid aiming, movements are planned and executed to avoid “worse-case” outcomes that require time and energy to correct. As such, downward movements initially undershoot the target to avoid corrections against gravity. Illusory target context can also impact aiming bias. Here, we sought to determine how strategic biases mediate illusory biases. Participants aimed to Müller-Lyer figures in different directions (forward, backward, up, down). Downward biases emerged late in the movement and illusory biases emerged from peak velocity. The illusory effects were greater for downward movements at terminal endpoint. These results indicate that strategic biases interact with the limb-target control processes associated with illusory biases. Thus, multiple control processes during rapid aiming may combine, and later affect endpoint accuracy (Elliott et al., 2010, Psychol Bull 136:1023-1044, 2010).

Item Type: Article
Additional Information and Comments: This is an Accepted Manuscript of an article published by Taylor & Francis in the Journal of Motor Behavior on 30th June 2016, available online: http://www.tandfonline.com/doi/full/10.1080/00222895.2016.1161588
Keywords: aiming, movement optimization, limb-target control, multiple process model
Faculty / Department: Faculty of Science > School of Health Sciences
Depositing User: James Roberts
Date Deposited: 20 Jun 2017 09:15
Last Modified: 20 Jun 2017 09:15
URI: http://hira.hope.ac.uk/id/eprint/2055

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