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Expanding Universe Illusion
David Phillips1, Priscilla Heard2, Christopher W Tyler3
1Hemel Hempstead, UK.
I-Perception
|June 21, 2019
Summary
Global expansion and contraction create a novel visual illusion, causing perceived lateral movement in triangle edges. This effect stems from how textures within the shape influence motion perception.
Area of Science:
- Visual perception
- Psychophysics
- Motion illusions
Background:
- Visual illusions demonstrate the brain's interpretation of sensory input.
- Movement illusions can arise from static visual stimuli.
- Texture properties can influence perceived motion.
Purpose of the Study:
- To introduce and describe a new visual illusion.
- To investigate the relationship between global shape transformation and perceived motion.
- To explore the role of texture in inducing movement illusions.
Main Methods:
- A triangular region filled with rising or falling textures was used.
- Global expansion or contraction of the triangular region was presented.
- Observers reported perceived motion of the triangle's edges.
Main Results:
- Global expansion/contraction induced a compelling lateral movement illusion.
- The illusion affected the oblique edges of the triangular region.
- The perceived motion was linked to the texture's direction.
Conclusions:
- A novel induced movement illusion is demonstrated.
- Global visual field expansion/contraction can create illusory motion.
- Texture-defined motion appears to be a key factor in this illusion.
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