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Short communication: Binocular rivalry dynamics during locomotion

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  • Brian Szekely
  • Robert Keys
  • Paul MacNeilage
  • David Alais

Abstract

Locomotion has been shown to impact aspects of visual processing in both humans and animal models. In the current study, we assess the impact of locomotion on the dynamics of binocular rivalry. We presented orthogonal gratings, one contrast-modulating at 0.8 Hz (matching average step frequency) and the other at 3.2 Hz, to participants using a virtual reality headset. We compared two conditions: stationary and walking. We continuously monitored participants’ foot position using tracking devices to measure the step cycle. During the walking condition, participants viewed the rivaling gratings for 60-second trials while walking on a circular path in a virtual reality environment. During the stationary condition, observers viewed the same stimuli and environment while standing still. The task was to continuously indicate the dominant percept via button press using handheld controllers. We found no significant differences between walking and standing for normalized dominance duration distributions, mean normalized dominance distributions, mean alternation rates, or mean fitted frequencies. Although our findings do not align with prior research highlighting distinctions in normalized dominance distributions between walking and standing, our study contributes unique evidence indicating that alternation rates vary across the step cycle. Specifically, we observed that the number of alternations is at its lowest during toe-off phases and reaches its peak at heel strike. This novel insight enhances our understanding of the dynamic nature of alternation patterns throughout the step cycle.

Suggested Citation

  • Brian Szekely & Robert Keys & Paul MacNeilage & David Alais, 2024. "Short communication: Binocular rivalry dynamics during locomotion," PLOS ONE, Public Library of Science, vol. 19(4), pages 1-11, April.
  • Handle: RePEc:plo:pone00:0300222
    DOI: 10.1371/journal.pone.0300222
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