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. 2017 Nov 29;8(6):2041669517735541. doi: 10.1177/2041669517735541

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© The Author(s) 2017

This article is distributed under the terms of the Creative Commons Attribution 4.0 License (http://www.creativecommons.org/licenses/by/4.0/) 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 (https://us.sagepub.com/en-us/nam/open-access-at-sage).

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Figure 7. — Comparison of the perspective-space model with Foley’s model. (a) According to Foley’s model, a physical line (blue) of size S_p, whose ends are located at distances R₁ and R₂, is perceived as a line (red) of size S_v having the ends at distances R′₁ and R′₂. (b) The same physical line and how it is perceived according to the perspective-space model.