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. 2024 Feb 5;14:2900. doi: 10.1038/s41598-024-53468-4

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© The Author(s) 2024

Open Access This 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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Spline interpolated isovoltage scalp maps illustrating (1) the effect of practice on the N400 amplitudes of the exemplar condition in participants with low SPQ scores (N = 23) and (2) the absence of such an effect in the high SPQ (N = 24) subgroup. The values coded by the map colors correspond to the results of the subtraction of the mean ERP voltages of session 1 from those of session 2 in the N400 time window (300 ms – 500 ms). * are for 0.05 > p > 0.01. ** are for 0.01 > p > 0.001.