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. 2021 Sep 28;22(6):703–717. doi: 10.1007/s10162-021-00817-z

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© The Author(s) 2021

Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 8 — Mean contrast values (i.e., ERAs relative to silence, arbitrary units) as a function of stimulus intelligibility and hemisphere in a priori and post hoc ROIs. Panel a shows results for the a priori auditory ROIs (channels 29 and 33 in the LH and channels 7 and 12 in the RH). Response amplitude increases with rising stimulus intelligibility, but only in the LH, as confirmed by a significant stimulus intelligibility × hemisphere interaction (p < 0.001). Panel b shows results for the post hoc ROIs, which are the channels that showed the strongest evidence of a positive linear relationship with stimulus intelligibility (asymmetrical channels 23, 28, and 29 in the LH and channels 2, 6, and 11 in the RH). In these ROIs, responses in the LH and RH showed a more similar pattern, increasing as stimuli became more intelligible. Error bars show 95 % confidence intervals corrected for a repeated-measures design following O’Brien and Cousineau (2014)