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The contribution of face outlines to the fat face illusion
Zhong Ming 1 #,Xiaoyang Yu 2,Zhe Wang 2,Yuhao Sun 2 *
1.Department of psychology, Zhejiang Sci-Tech University, HangZhou 310018
2.Department of psychology, Zhejiang Sci-Tech University
*Correspondence author
#Submitted by
Subject:
Funding: Foundation of Zhe’jiang Social Scientific Association(No.No. 2011N090), National Natural Science Foundation of China (No.No. 31100737), Research Foundation of Educational Department of Zhe’jiang Province (No.No. Z201122112)
Opened online:11 October 2012
Accepted by: none
Citation: Zhong Ming ,Xiaoyang Yu,Zhe Wang.The contribution of face outlines to the fat face illusion[OL]. [11 October 2012] http://en.paper.edu.cn/en_releasepaper/content/4490537
 
 
When two upright identical images of the same face (but not clocks) were aligned vertically, the face at the bottom appeared 'fatter'. We conducted three experiments to test whether the outline of face have any contribution to this illusion. In experiment 1, we changed the face photos' outline as ovals. Subjects showed the illusion again, which indicated the face inner parts were important to the illusion. In experiment 2 & 3, we used the same line-changed inner parts of faces, with trapezoid and hexagon as outline respectively. Results showed that the trapezoid came up with the illusion but the hexagon didn't, suggesting the outline also have effect on the phenomenon.
Keywords:fat face illusion; outlines of faces; inner parts of face
 
 
 

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