Conflicts of Interest The authors declare no conflicts of interest. Data Availability Statement The data that support the findings of this study are openly available in the ADHD-200 Consortium, at http://fcon_1000.projects.nitrc.org/indi/adhd200/index.html. Open Research Badges This article has earned an Open Data badge for making publicly available the digitally-shareable data necessary to reproduce the reported results. The data is available in the Supporting Information section.