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. 2014 Mar 13;5:207. doi: 10.3389/fpsyg.2014.00207

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Copyright © 2014 Vanderhasselt, Remue, Ng and De Raedt.

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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The upper panel shows the line plot illustrating the changes in baseline-adjusted pupil diameters from cue to picture of individual participants. Regardless of emotion (left: positive, right: negative), pupillary changes tended to have opposite signs during the two stages of stimulus presentation, explaining the inverse correlations. The lower panel shows the scatterplots between mean pupil sizes during cue and picture when the Emotion of the trials was positive (left) and negative (right).