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. 2018 Nov 28;9:2396. doi: 10.3389/fpsyg.2018.02396

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Copyright © 2018 Toet, Kaneko, Ushiama, Hoving, de Kruijf, Brouwer, Kallen and van Erp.

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) and the copyright owner(s) 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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Relation between mean valence and arousal ratings for both measurement methods investigated in Experiment I. Blue dots: mean ratings obtained with VAS scales. Red dots: mean ratings obtained with the EmojiGrid. Black squares: mean ratings obtained with VAS scales from the study by Foroni et al. (2013). The blue and red lines represent a linear and quadratic fit to the VAS and EmojiGrid data points, respectively. The adjusted R-squared values represent the agreement between the data and the fits.