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. 2018 Jan 10;8:317. doi: 10.1038/s41598-017-18741-9

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© The Author(s) 2017

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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Fixation density comparisons between large vs. small faces. (A) 2D probability distribution of fixation densities. Shaded area denotes one SEM across subjects. The green bar illustrates the points with significant difference between large vs. small faces (paired two-tailed t-test, P < 0.05, FDR corrected). (B) Fixation density probability maps for large vs. small faces. A common scale (in arbitrary units) is used for both plots. Red rectangles denote the ROIs used for analysis (not shown to subjects). (C) A difference map of fixation density. Red: large > small. Blue: small > large. (D) A statistical map. Significant differences in fixation density between face sizes are shown in red (two-tailed paired t-test at each pixel, P < 0.05 uncorrected). Face images were constructed from⁴⁴.