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Gesturing during mental problem solving reduces eye movements, especially for individuals with lower visual working

Wim T J L Pouw1,2, Myrto-Foteini Mavilidi3, Tamara van Gog4,5

  • 1Department of Psychology, Education and Child Studies, Erasmus University Rotterdam, Rotterdam, The Netherlands. pouw@fsw.eur.nl.

Cognitive Processing
|March 20, 2016
PubMed
Summary

Gesturing during problem-solving reduces eye movements, especially for those with lower visual working memory capacity. This cognitive benefit of gesturing aids mental simulations without impacting final performance.

Keywords:
Embodied cognitionEye trackingGestureProblem solvingTower of Hanoi

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Area of Science:

  • Cognitive Psychology
  • Human-Computer Interaction
  • Neuroscience

Background:

  • Non-communicative hand gestures enhance problem-solving performance.
  • Gestures may compensate for cognitive limitations, such as visual working memory capacity.
  • The precise cognitive mechanism by which gestures aid problem-solving remains unclear.

Purpose of the Study:

  • To investigate the hypothesis that gesturing spatially indexes mental simulations, reducing reliance on visual projection.
  • To examine the effect of co-thought gesturing and visual working memory capacity on eye movements during problem-solving.
  • To determine if reduced eye movements during gesturing correlate with improved cognitive offloading.

Main Methods:

  • Mobile eye tracking was employed to monitor participants' eye movements.
  • Participants engaged in solving the Tower of Hanoi problem, with and without gesturing.
  • Visual working memory capacity was assessed to analyze its interaction with gesturing and eye movements.

Main Results:

  • Gesturing significantly reduced the number of eye movements (saccade counts) during mental problem-solving.
  • This reduction in eye movements was particularly pronounced in participants with lower visual working memory capacity.
  • Problem-solving performance was not significantly affected by the presence or absence of gesturing during the mental solving phase.

Conclusions:

  • Gesturing appears to facilitate cognitive processes by reducing the need for visual scanning, supporting the spatial indexing hypothesis.
  • Eye movement patterns during gesturing offer insights into the cognitive benefits of embodied cognition in problem-solving.
  • Future research should integrate eye-tracking data to further elucidate the role of gestures in cognitive functions.