Related Experiment Video
Updated: May 10, 2026
06:25
Motion-Acuity Test for Visual Field Acuity Measurement with Motion-Defined Shapes
Published on: February 23, 2024
Differences in perceived travel distance from central versus peripheral optic flow are the same when standing and
Ambika Bansal1, Hongyi Guo1, Robert S Allison1
1Centre for Vision Research, York University, Canada.
Plos One
|May 8, 2026
Summary
Peripheral optic flow significantly increases perceived travel distance, especially when visual cues are dominant. This effect holds even when integrating non-visual cues, highlighting peripheral vision
Area of Science:
- Perception
- Human Movement Science
- Visual Neuroscience
Background:
- Self-motion perception is crucial for navigation and is influenced by visual and non-visual cues.
- Previous research indicates peripheral optic flow can exaggerate perceived travel distance when seated.
- The integration of visual and non-visual cues in self-motion perception, particularly concerning peripheral vision, remains under-explored.
Purpose of the Study:
- To investigate how peripheral optic flow affects perceived travel distance under different sensory conditions.
- To determine if non-visual cues (e.g., walking) alter the influence of peripheral optic flow on distance estimation.
- To examine the generalizability of peripheral vision's heightened sensitivity in perceptual odometry.
Main Methods:
- Participants experienced simulated self-motion via a large-field edgeless display under visual-only, blindfolded walking, or visual-and-treadmill conditions.
- Optic flow was presented in the full field, central field (≤40°), or far periphery (>180°).
- Distance estimation was measured using Move-To-Target and Adjust-Target tasks.
Main Results:
- In the Move-To-Target task, peripheral optic flow consistently led to greater perceived distances (higher gains) compared to central or full-field flow.
- Blindfolded walking also increased perceived distances more than visual-only or combined conditions in the Move-To-Target task.
- No significant differences were found in the Adjust-Target task, and no interaction effects between field-of-view and locomotion were observed.
Conclusions:
- Heightened sensitivity to optic flow in the far periphery is a robust feature of perceptual odometry.
- This peripheral sensitivity persists even when integrating non-visual cues with visual information.
- The findings suggest peripheral vision plays a critical, general role in estimating self-motion distances.
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