The folded paper size illusion : Evidence of inability to perceptually integrate more than one geometrical dimension

Faculty/Professorship: General Psychology and Methodology  
Author(s): Carbon, Claus-Christian  
Title of the Journal: i-Perception
ISSN: 2041-6695
Publisher Information: London : Pion
Year of publication: 2016
Volume: 7
Issue: 4
Pages: 5
Language(s): English
DOI: 10.1177/2041669516658048
The folded paper-size illusion is as easy to demonstrate as it is powerful in generating insights into perceptual processing: First take two A4 sheets of paper, one original sized, another halved by folding, then compare them in terms of area size by centering the halved sheet on the center of the original one! We perceive the larger sheet as far less than double (i.e., 100%) the size of the small one, typically only being about two thirds larger—this illusion is preserved by rotating the inner sheet and even by aligning it to one or two sides, but is dissolved by aligning both sheets to three sides, here documented by 88 participants’ data. A potential explanation might be the general incapability of accurately comparing more than one geometrical dimension at once—in everyday life, we solve this perceptual-cognitive bottleneck by reducing the complexity of such a task via aligning parts with same lengths.
Keywords: art, illusion, perception
Peer Reviewed: Ja
International Distribution: Ja
Open Access Journal: Ja
Type: Article
Release Date: 10. October 2022
Project: Open-Access-Publikationsfonds 2012-2020