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. 2014 Jun 30;33(1):18. doi: 10.1186/1880-6805-33-18

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Copyright © 2014 Choi et al.; licensee BioMed Central Ltd.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Grand-averaged event-related potential (ERP) waveforms elicited at Pz. High empathy participants (thick line, n = 12, range of total Interpersonal Reactivity Index (IRI) scores: 80 to 96) and low empathy participants (thin line, n = 10, range of total IRI scores: 54 to 78) were selected by total IRI score and labelled only for illustrative purposes.