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. 2019 Feb 13;28(9):1241–1251. doi: 10.1007/s00787-019-01279-8

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© The Author(s) 2019

OpenAccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

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Fig. 1 — Trivariate ACE model. Rectangles refer to the variance of observed variables. HYP/IMP hyperactivity–impulsivity, INATT inattentiveness, MAAS Mindful Attention Awareness Scale. Circles refer to latent genetic (A), shared environmental (C) and non-shared environmental (E) factors. Each latent variable has a variance of 1. The curved double-headed arrows refer to genetic and environmental correlations (r_A, r_C, r_E)