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Human Vicarious Trial and Error Is Predictive of Spatial Navigation Performance.

Diogo Santos-Pata1,2,3, Paul F M J Verschure1,2,3,4

  • 1SPECS: The Perceptive, Emotive and Cognitive Systems Group, Barcelona, Spain.

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|October 30, 2018
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Summary

Humans exhibit Vicarious trial and error (VTE) head-scanning behaviors during spatial learning, similar to rats. This VTE behavior decreases as learning progresses and accurately predicts navigation task performance.

Keywords:
deliberationhabitualhippocampusnavigationspatial decision-making

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Area of Science:

  • Neuroscience
  • Cognitive Science
  • Behavioral Science

Background:

  • Rats exhibit Vicarious trial and error (VTE) during spatial learning, pausing at decision points to scan potential routes.
  • This VTE behavior is thought to be crucial in early learning stages before habitual navigation emerges.
  • While extensively studied in rats, VTE in human spatial navigation remains less explored.

Purpose of the Study:

  • To investigate if human head-scanning behaviors during navigation mirror rat VTE.
  • To determine if these head-scanning behaviors predict spatial learning performance in humans.
  • To assess the role of VTE in human spatial learning and navigation.

Main Methods:

  • Participants performed a virtual navigation task in a symmetric environment.
  • Spatial learning was evaluated by analyzing trajectory, timing, and head orientation data.
  • Vicarious trial and error was quantified using the IdPhi metric, specifically at decision points.

Main Results:

  • Navigation performance improved over trials, indicated by decreased trajectory length and duration.
  • The IdPhi metric, a measure of VTE, also decreased with learning, mirroring findings in rats.
  • IdPhi at the first decision point correlated significantly with trial duration and length, predicting performance.

Conclusions:

  • Head-scanning behavior, or VTE, is a key indicator of the spatial learning stage in humans.
  • VTE can accurately predict an individual's performance in navigation tasks.
  • This study highlights conserved mechanisms of spatial learning between rodents and humans.