The idea of self regulation is that you rule yourself. By the time children are three or four, they have multiple motives in conflict. Some kids can wait no more than a mill a second for two treats versus one right away. Other kids can wait hours. If you were to walk into a prek class room and divide the kids, let's say, into three groups, medium, selfguat, low and high, what share of the low group would be boys vs. girls? I think there's conflicting evidence. When you talk about who gets in trouble in class more, it could be boys because we've decided to stick kids in a chair all day. It's not a