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Eye Movements during Visuomotor Adaptation Represent Only Part of the Explicit Learning. | LitMetric

Eye Movements during Visuomotor Adaptation Represent Only Part of the Explicit Learning.

eNeuro

Department of Bioengineering, Imperial College London, London SW7 2AZ, United Kingdom

Published: September 2020

AI Article Synopsis

  • Visuomotor rotations are learned through both explicit strategies and implicit recalibration, but distinguishing the contributions of each is difficult due to the complexity of their interactions.
  • A study compared eye movements during adaptation to two explicit learning measures (verbal report and exclusion test) and found discrepancies in eye movements when subjects didn't report their intentions, indicating varied levels of explicit adaptation.
  • The research suggests that individuals may exhibit different combinations of explicit and implicit learning, with eye movements reflecting only part of the explicit learning; longer reaction times associated with eye movements could indicate a connection to mental rotation processes.

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 reflects 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 among 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 the following 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.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6978919PMC
http://dx.doi.org/10.1523/ENEURO.0308-19.2019DOI Listing

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