I wold be interested to know if it relates to all types of ADHD also. In my personal experience there is not just one level. I remember 30 years ago or so there were school systems that just used ADHD as a blanket for all students that did not stay interested in whatever the teacher was teaching. The ones that really did have ADHD didn’t receive the diagnosis and help that they needed to thrive. If they have linked sleep to this I would be interested to see a longer term positive study showing the results. Thanks for sharing.