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. 2017 Oct 17;8:1854. doi: 10.3389/fpsyg.2017.01854

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Copyright © 2017 Somppi, Törnqvist, Topál, Koskela, Hänninen, Krause and Vainio.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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(A) The mean number of fixations targeted to the eye regions of happy and angry faces (Lg10 transformed values). (B) The mean number of revisits targeted to the eye regions of happy and angry faces (Lg10 transformed values). (C) The mean pupil diameter (mm) during the presentation of two facial expressions (Happy and Angry) and two treatments (PLB and OXT). Error bars represent SE. Asterisks indicate significant differences (^∗∗p < 0.01, ^∗p < 0.05) and a statistical trend (^#p < 0.09).