Estimating the implicit component of visuomotor rotation learning by constraining movement preparation time

Leow, Li-Ann, Gunn, Reece, Marinovic, Welber and Carroll, Timothy J. (2017) Estimating the implicit component of visuomotor rotation learning by constraining movement preparation time. Journal of Neurophysiology, . doi:10.1152/jn.00834.2016


Author Leow, Li-Ann
Gunn, Reece
Marinovic, Welber
Carroll, Timothy J.
Title Estimating the implicit component of visuomotor rotation learning by constraining movement preparation time
Journal name Journal of Neurophysiology   Check publisher's open access policy
ISSN 0022-3077
1522-1598
Publication date 2017-03-29
Sub-type Article (original research)
DOI 10.1152/jn.00834.2016
Open Access Status Not yet assessed
Total pages 36
Place of publication Bethesda, MD, United States
Publisher American Physiological Society
Collection year 2018
Language eng
Abstract When sensory feedback is perturbed, accurate movement is restored by a combination of implicit processes and deliberate re-aiming to strategically compensate for errors. Here, we directly compare two methods used previously to dissociate implicit from explicit learning on a trial-by-trial basis: 1) asking participants to report the direction that they aim their movements, and contrasting this with the directions of the target and the movement that they actually produce, 2) manipulating movement preparation time. By instructing participants to re-aim without a sensory perturbation, we show that re-aiming is possible even with the shortest possible preparation times, particularly when targets are narrowly distributed. Nonetheless, re-aiming is effortful and comes at the cost of increased variability, so we tested whether constraining preparation time is sufficient to suppress strategic re-aiming during adaptation to visuomotor rotation with a broad target distribution. The rate and extent of error reduction under preparation time constraints were similar to estimates of implicit learning obtained from self-report without time pressure, suggesting that participants chose not to apply a re-aiming strategy to correct visual errors under time pressure. Surprisingly, participants who reported aiming directions showed less implicit learning according to an alternative measure, obtained during trials performed without visual feedback. This suggests that the process of reporting can affect the extent or persistence of implicit learning. The data extend existing evidence that restricting preparation time can suppress explicit re-aiming, and provide an estimate of implicit visuomotor rotation learning that does not require participants to report their aiming directions.
Keyword Implicit learning
Explicit learning
Compensatory strategies
Motor learning
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ
Additional Notes Published online 29 March 2017. Article in Press

Document type: Journal Article
Sub-type: Article (original research)
Collections: HERDC Pre-Audit
School of Human Movement and Nutrition Sciences Publications
 
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Created: Fri, 31 Mar 2017, 08:34:33 EST by Li-ann Leow on behalf of School of Human Movement and Nutrition Sciences