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. 2020 Nov 23;10:20377. doi: 10.1038/s41598-020-77263-z

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© The Author(s) 2020

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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Coordination of directional intentions. (A) The degree of congruence between pairs of musicians’ directional intentions was measured as the average distance between slider values. Mean slider distance for real pairs highly significantly differed from mean slider distances computed over time-scrambled pairs (t(65) = 2.98, p = 0.004, d = 0.25), indicating that musicians’ directional intentions were closer to each other than would be predicted by chance. (B) Correlations (Pearson’s rho) only marginally differed from the chance-level computed from scrambled pairs (t(65) = 1.86, p = 0.067, d = 0.33) and from zero (t(65) = 1.85, p = 0.068, d = 0.23), with a small effect size reflecting the fact that some pairs tended to be correlated, and other pairs to be anti-correlated. Error bars show 95% confidence intervals, black asterisks show the pairwise t-test comparing real vs. scrambled data (with **p < 0.01; ⁺p < 0.07) and white asterisks the one-sample t-tests comparing Pearson’s rho to zero (with ⁺p < 0.07).