Ponzo's Illusion

Initializing live version
Download to Desktop

Requires a Wolfram Notebook System

Interact on desktop, mobile and cloud with the free Wolfram Player or other Wolfram Language products.

Psychologist Mario Ponzo proposed that people determine the size of an object by taking into account the object's background. This is a Demonstration of Ponzo's illusion in which the top line is perceived to be longer than the bottom line, as a result of their relative placement in the triangle. Observe whether a change in thickness, color, or placement affects the perceived change in length.

Contributed by: Pooja Nikki Bisarya (June 2016)
Open content licensed under CC BY-NC-SA




[1] Wikipedia. "Ponzo Illusion." (Jun 8, 2016) en.wikipedia.org/wiki/Ponzo_illusion.

Feedback (field required)
Email (field required) Name
Occupation Organization
Note: Your message & contact information may be shared with the author of any specific Demonstration for which you give feedback.