Concept
Version 11
Created by Boundless
Perceptual Constancy
![The Ponzo illusion](../../../../../../../../../figures.boundless-cdn.com/31489/full/j5lub9rj2xiozarx24fw.gif)
The Ponzo illusion
This famous optical illusion uses size constancy to trick us into thinking the top yellow line is longer than the bottom; they are actually the exact same length.
Source
Boundless vets and curates high-quality, openly licensed content from around the Internet. This particular resource used the following sources:
"Ponzo_illusion.gif."
https://en.wikipedia.org/wiki/Subjective_constancy%23/media/File:Ponzo_illusion.gif
Wikipedia
Public domain.