 | This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. Find sources: "Wundt illusion" – news · newspapers · books · scholar · JSTOR (October 2019) (Learn how and when to remove this message) |
| This article relies largely or entirely on a single source. Relevant discussion may be found on the talk page. Please help improve this article by introducing citations to additional sources. Find sources: "Wundt illusion" – news · newspapers · books · scholar · JSTOR (April 2024) |
The Wundt illusion is an optical illusion that was first described by the German psychologist Wilhelm Wundt in the 19th century. The two red vertical lines are both straight, but they may look as if they are bowed inwards to some observers. The distortion is induced by the crooked lines on the background, as in the Orbison illusion. The Hering illusion produces a similar, but inverted effect.
Vertical-horizontal illusion
Another variant of the Wundt illusion is the Horizontal–Vertical Illusion, introduced by Wundt in 1858. The two intersecting lines are equal in length although the vertical line appears to be much longer. The horizontal line needs to be extended up to 30% to match the perceptual length of the vertical line. This is not confined to simple line drawings, as this can also be seen in buildings, parking meters, as well as other things viewed in a natural setting.
References
- Wade, Nicholas J; Sakurai, Kenzo; Gyoba, Jiro (February 2007). "Whither Wundt?". Perception. 36 (2): 163–166. doi:10.1068/p3602ed. ISSN 0301-0066. PMID 17402661.
External links
Media related to Wundt illusion at Wikimedia Commons
| Optical illusions (list) | ||
|---|---|---|
| Illusions |
|  |
| Popular culture |
| |
| Related | ||
 | This psychology-related article is a stub. You can help Misplaced Pages by expanding it. |