More recent version available under http://dx.doi.org/10.18725/OPARU-5250
The mirrored triangles illusion: on the perceived distance between triangles in mirror image arrangement
Wissenschaftlicher Artikel
Faculties
Fakultät für NaturwissenschaftenAbstract
The mirrored triangles illusion is described and investigated. Two black isosceles triangles are arranged symmetrically with respect to a vertical plane such that the apices face each other. While keeping their distance as well as their area constant, the shape of the triangles is varied. It is observed that the apparent distance of the tips varies as a function of the triangles´ shape, exhibiting a maximum when they are nearly rectangular. This coincides with the situation where the diameter of the outer circle encompassing both triangles approaches a minimum. An explanation is proposed where the variation of the apparent distance is ascribed to a size constancy effect. A mathematical function is derived and fitted to the experimental values. From this, a size constancy parameter of k= 0.477(33) is obtained.
Date created
2017-10-13
Later version(s)
http://dx.doi.org/10.18725/OPARU-5250Subject headings
[GND]: Geometrisch-optische Täuschung | Größenkonstanz | Kontexteffekt[LCSH]: Distances
[Free subject headings]: Apparent distance | Data processing capacity | Geometrical-optical illusion | Size constancy | Context effect
[DDC subject group]: DDC 530 / Physics
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Please use this identifier to cite or link to this item: http://dx.doi.org/10.18725/OPARU-4528
Kreiner, Welf A. (2017): The mirrored triangles illusion: on the perceived distance between triangles in mirror image arrangement. Open Access Repositorium der Universität Ulm und Technischen Hochschule Ulm. http://dx.doi.org/10.18725/OPARU-4528
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