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. 2018 Mar 12;8:4324. doi: 10.1038/s41598-018-22731-w

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© The Author(s) 2018

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Experimental setup. (A) Virtual apartment. Top: bird’s eye view of the environment. On each trial, the target was shown on the TV at the end of the hallway when subjects approached it. Subjects then searched for the target in the two rooms. Bottom: views of the living room (left) and bedroom (right). (B) A subject wearing the head-mounted display (HMD), which was equipped with an Arrington eye tracker and a HiBall head position tracker. (C) Top: target objects. Bottom: illustration of the placements of the targets on eight surfaces across the two rooms. Note that the sizes of the targets are enlarged for illustrative purposes. (D) An example trial sequence of five search blocks. Locations of targets are constant in Block 1–3 and Block 5. In Block 4, all target objects were shuffled to a different location in either the same room or the other room in each trial.