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Related Experiment Video

Updated: Jun 12, 2026

Three-Dimensional Reconstruction of Orbital Fractures

Three-Dimensional Reconstruction of Orbital Fractures

Published on: May 16, 2025

Where's the Floor?

L R Harris¹, M R M Jenkin, H L M Jenkin

¹Centre for Vision Research, York University, Toronto, Ontario M3J1P3, Canada. harris@ yorku.ca

Seeing and Perceiving

|May 29, 2010

Summary

This summary is machine-generated.

People select footings based on visual cues, not just gravity. Room shape and visual surface area significantly influence choices for secure footing.

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Area of Science:

Human visual perception
Biomechanics
Robotics and artificial intelligence

Background:

Humans use visual and balance information to navigate and select stable surfaces.
Understanding how visual cues influence foot placement is crucial for safe locomotion.

Purpose of the Study:

To investigate how visual cues, specifically the subtended visual area of surfaces, influence the selection of a secure footing.
To determine if the orientation closest to the gravity-defined vertical is the sole determinant for choosing a support surface.

Main Methods:

Participants were exposed to rectangular rooms with varying aspect ratios and tilts.
Subjects were tasked with selecting a secure support surface within these environments.
The orientation of the chosen surface and its subtended visual area were analyzed.

Main Results:

Footing selection was not solely based on the surface normal aligning with the gravity-defined vertical.
A strong bias towards surfaces with larger subtended visual areas was observed.
The aspect ratio of the room influenced the perceived visual area of the surfaces.

Conclusions:

Visual perception of surface area plays a significant role in foot placement decisions.
Locomotion planning integrates complex visual information beyond simple gravitational alignment.
Findings have implications for understanding human navigation and designing assistive technologies.