City Research Online

Expanding Universe Illusion

Phillips, D., Heard, P. & Tyler, C. W. ORCID: 0000-0002-1512-4626 (2019). Expanding Universe Illusion. I-PERCEPTION, 10(3), article number 2041669519. doi: 10.1177/2041669519853848


We present a new induced movement illusion from global expansion or contraction in a triangular region filled with rising or falling textures. Objective global expansion or contraction induces lateral movement in the oblique edges of the triangle. The effects may be due to common and relative movements operating within a single texture.

Publication Type: Article
Additional Information: Copyright © The Author(s) 2019. This article is distributed under the terms of the Creative Commons Attribution 4.0 License ( which permits any use, reproduction and distribution of the work without further permission provided the original work is attributed as specified on the SAGE and Open Access pages (
Publisher Keywords: visual illusion; motion; induced motion; optic flow
Departments: School of Health & Psychological Sciences > Optometry & Visual Sciences
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