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Model of ADHD effects on individual and group. Three classes of humans are shown: males with and without ADHD–HI (a continuum in reality), and females. The large grey circuit indicates the reproductive cycle from conception to adulthood and mating. At the right are shown the group benefits that arise from ADHD–HI, which may in turn be caused by the failure of developmental buffering in a minority of males. For more details see text.
