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. 2017 Jul 5;8(4):2041669517718697. doi: 10.1177/2041669517718697

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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 1. — Apparatus: To spatially collocate the visual, auditory and tactile stimuli, the reflection of the visual stimulus was presented on a mirror 285 mm away from the eyes and 285 mm away from the VIEWPixx LCD display, making the optical path length equal to the distance from the top of the wooden ball to the eyes (570 mm). The auditory stimulus was presented with a small powered speaker located on the same plane as the visual stimulus’s reflection and adjacent to it. Both the wooden ball and speaker were hidden from view by the mirror and black fabric respectively.