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Going round the bend: Persistent personal biases in walked angles.

Simon Jetzschke1, Marc O Ernst1, Alessandro Moscatelli2

  • 1Department of Cognitive Neuroscience and Cognitive Interaction Technology-Centre of Excellence, P.O. Box 100131, 33501 Bielefeld, Germany.

Neuroscience Letters
|February 9, 2016
PubMed
Summary

Human navigation relies on multiple senses. This study found persistent, individual biases in estimating walked angles without visual or auditory cues, revealing a stable internal navigation error.

Keywords:
Dead reckoningHuman navigationIdiosyncratic biasesPath integrationWalking

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Area of Science:

  • Human navigation
  • Sensory integration
  • Proprioception

Background:

  • Human navigation integrates multisensory information (vision, audition, vestibular, proprioception).
  • Understanding internal mechanisms of spatial orientation and self-motion perception is crucial.

Purpose of the Study:

  • To investigate human navigation mechanisms by analyzing performance in angle-walking tasks without external cues.
  • To identify systematic biases in angle estimation and their temporal stability.

Main Methods:

  • Participants performed angle-walking tasks (±90° turns) without visual or auditory input.
  • Path length was varied in the first experiment.
  • A second experiment involved judging walked angles (two-alternative forced-choice) several weeks later.

Main Results:

  • Significant, idiosyncratic biases in walked turn angles were observed.
  • Path length had minimal impact on angle accuracy and precision.
  • Personal biases in angle estimation were highly correlated between the two experiments conducted weeks apart.

Conclusions:

  • Persistent, individual biases in walked angles exist even without external directional cues.
  • These biases represent a surprisingly time-stable and idiosyncratic error component in human navigation.