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Robust size illusion produced by expanding and contracting flow fields
Dong, Xue1,2; Bai, Jianying1; Bao, Min1
First AuthorDong, Xue
Source PublicationVISION RESEARCH

A new illusion is described. Randomly positioned dots moved radially within an imaginary annular window. The dots' motion periodically changed the direction, leading to an alternating percept of expanding and contracting motion. Strikingly, the apparent size of the enclosed circular region shrank during the dots' expanding phases and dilated during the contracting phases. We quantitatively measured the illusion, and found that the presence of energy at the local kinetic edge could not account for the illusion. Besides, we reproduced the illusion on a natural scene background seen from a first-person point of view that moved forward and backward periodically. Blurring the boundaries of motion areas could not reverse the illusion in all subjects. Taken together, our observed illusion is likely induced by optic flow processing with some components of motion contrast. Expanding or contracting dots may induce the self-motion perception of either approaching or leaving way from the circle. These will make the circle appear smaller or larger since its retinal size remains constant. (C) 2017 Elsevier Ltd. All rights reserved.

KeywordSize illusion Motion Optic flow Size constancy Depth perception
Indexed BySCI ; SSCI
Funding OrganizationKey Research Program of Chinese Academy of Sciences(KSZD-EW-TZ-003) ; National Natural Science Foundation of China(31371030)
WOS Research AreaNeurosciences & Neurology ; Ophthalmology
WOS SubjectNeurosciences ; Ophthalmology
WOS IDWOS:000399865500009
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine
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Document Type期刊论文
Corresponding AuthorBao, Min
Affiliation1.Inst Psychol, CAS Key Lab Behav Sci, 16 Lincui Rd, Beijing 100101, Peoples R China
2.Univ Chinese Acad Sci, Dept Psychol, Beijing, Peoples R China
Recommended Citation
GB/T 7714
Dong, Xue,Bai, Jianying,Bao, Min. Robust size illusion produced by expanding and contracting flow fields[J]. VISION RESEARCH,2017,133(0):87-94.
APA Dong, Xue,Bai, Jianying,&Bao, Min.(2017).Robust size illusion produced by expanding and contracting flow fields.VISION RESEARCH,133(0),87-94.
MLA Dong, Xue,et al."Robust size illusion produced by expanding and contracting flow fields".VISION RESEARCH 133.0(2017):87-94.
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