Eye movements during visuomotor adaptation represent only part of the explicit learning
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Published version
Author(s)
Bromberg, Zohar
Donchin, Opher
Haar, Shlomi
Type
Journal Article
Abstract
Visuomotor rotations are learned through a combination of explicit strategy and implicit recalibration. However, measuring the relative contribution of each remains a challenge and the possibility of multiple explicit and implicit components complicates the issue. Recent interest has focused on the possibility that eye movements reflect explicit strategy. Here we compared eye movements during adaptation to two accepted measures of explicit learning - verbal report and the exclusion test. We found that while reporting, all subjects showed a match between all three measures. However, when subjects did not report their intention, the eye movements of some subjects suggested less explicit adaptation than what was measured in an exclusion test. Interestingly, subjects whose eye movements did match their exclusion could be clustered into two subgroups: fully implicit learners showing no evidence of explicit adaptation and explicit learners with little implicit adaptation. Subjects showing a mix of both explicit and implicit adaptation were also those where eye movements showed less explicit adaptation than did exclusion. Thus, our results support the idea of multiple components of explicit learning as only part of the explicit learning is reflected in the eye movements. Individual subjects may use explicit components that are reflected in the eyes or those that are not or some mixture of the two. Analysis of reaction times suggests that the explicit components reflected in the eye-movements involve longer reaction times. This component, according to recent literature, may be related to mental rotation.
Date Issued
2019-11-27
Date Acceptance
2019-11-09
Citation
eNeuro, 2019, 6 (6), pp.1-12
ISSN
2373-2822
Publisher
Society for Neuroscience
Start Page
1
End Page
12
Journal / Book Title
eNeuro
Volume
6
Issue
6
Copyright Statement
© 2019 Bromberg et al.
This is an open-access article distributed under the terms of the Creative Commons Attribution 4.0 International license (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium provided that the original work is properly attributed.
This is an open-access article distributed under the terms of the Creative Commons Attribution 4.0 International license (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium provided that the original work is properly attributed.
Sponsor
The Royal Society
Identifier
https://www.eneuro.org/content/early/2019/11/27/ENEURO.0308-19.2019
Grant Number
NF170650
Subjects
Science & Technology
Life Sciences & Biomedicine
Neurosciences
Neurosciences & Neurology
visuomotor rotation
explicit learning
eye movement
motor control
motor learning
motor adaptation
IMPLICIT
COMPONENT
ROTATION
STRATEGY
explicit learning
eye movement
motor adaptation
motor control
motor learning
visuomotor rotation
1109 Neurosciences
Publication Status
Published
Date Publish Online
2019-11-27