Related Experiment Video
Updated: Jun 12, 2026

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
Abstract:
Visual and balance cues concerning the relative orientation of ourselves and our environment combine to direct our steps to select a secure footing. How are visual cues used to select the best support surface? Here we show that, when exposed to tilted, rectangular rooms of various aspect ratios, subjects do not necessarily choose the surface with its normal oriented closest to the gravity-defined vertical. Rather their decision is also strongly biased by the visual area subtended by each candidate surface.
Related Concept Videos
Movement Joints in Buildings
The simplest type of movement joints, working joints, are...
Taping Over Different Ground Profiles
Vibrating Concrete
Dry Friction
To illustrate this concept, imagine a wooden crate resting on a rough, non-uniform horizontal surface. When an external force is applied to...
Creep in Concrete
Finishing Concrete

