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. 2018 Jun 4;13(7):677–686. doi: 10.1093/scan/nsy042

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© The Author(s) (2018). Published by Oxford University Press.

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0/), which permits non-commercial re-use, distribution, and reproduction in any medium, provided the original work is properly cited. For commercial re-use, please contact journals.permissions@oup.com

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Fig. 6. — Left: amplitude of HEP difference scores (repetition—alternation trials) in response to viewing sad, happy and neutral facial expressions in experiment 2. Positive waveforms highlight a higher amplitude in repeated relative to alternated trials. Negative waveforms highlight reduced amplitude in repeated relative to alternated trials. Right: box plots highlighting the interactions between the three levels of valence: HEP elevation in repeated trials with sad expressions differs significantly from HEP elevation in neutral and happy repetition trials (whiskers represent s.d.).