How does ponzo illusion work

Separation : adjust to make the vertical or near vertical lines to be closer or farther apart. Make the Same Length : For the two horizontal lines to be the same length. Pressing this button restores the settings to their default values. Proceed to Quiz. Background Instructions Illustration Quiz. Background The Ponzo illusion is a strong example of misapplied size constancy as well as the influence of linear perspective a monocular cue to depth on size perception.

Instructions Full Screen Mode To see the illustration in full screen, which is recommended, press the Full Screen button, which appears at the top of the page. Illustration Tab Settings Below is a list of the ways that you can alter the illustration. The settings include the following: Top Line Length : adjust the length of the top line to make it appear the same length as the left hand line.

Some researchers believe that the Moon illusion is an example of the Ponzo illusion, with trees and houses playing the role of Ponzo's converging lines.

Foreground objects trick our brain into thinking the moon is bigger than it really is. One of the explanations for Ponzo illusion is the 'Perspective hypothesis', which states that the perspective feature in the figure is obviously produced by the converging lines ordinarily associated with distance, that is, the two oblique lines appear to converge toward the horizon or a vanishing point.

Another is the 'Framing effects hypothesis', which says that the difference in the separation or gap of the horizontal lines from the framing coverging lines may determine, or at least contribute to the magnitude of the distortion. Psychology Wiki Explore. Animal defensive behavior Kinesis Animal escape behavior Cooperative breeding Sexual cannibalism Cannibalism zoology Animal aggressive behavior.

Recent Blogs Community portal forum. The nature of size scaling in the Ponzo and related illusions. Gregory, R. Distortion of visual space as inappropriate constancy scaling. Nature , , p. Perceptual illusions and brain models. Proceedings of the Royal Society of London.

Series B, Biological Sciences , , pp. Macpherson, F. Cognitive penetration of colour experience: Rethinking the issue in light of an indirect mechanism. Philosophy and Phenomenological Research , 84 1 , pp. Prinzmetal, W. The Ponzo illusion and the perception of orientation. Shiraev, E. Cross-cultural psychology: Critical thinking and contemporary applications.

Home Explore Illusions Ponzo Illusion. Ponzo Illusion. Ponzo Illusion: The higher yellow line appears to be longer than the lower yellow line, despite both lines in fact being the same length. Illusion Credit Mario Ponzo - , Italian psychologist.