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. 2023 May 2;13:7154. doi: 10.1038/s41598-023-33780-1

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© The Author(s) 2023

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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(A) Estimated IRI trend of maintenance paradigm (pacing followed by continuation), and (B) second derivatives of the corresponding trends locating the turning points (blue square marks) in synchronization + block design (b_s as solid black line); syncopation + block design (b_sn as dashed black line); synchronization + alternating design (a_s as solid red line); and syncopation + alternating design (a_sn as dashed red line). Gold vertical solid line represents continuation phase onset.