>It’s a self fulfilling prophecy, the more constantly stimulated the kid is, the more difficult it is for them to pay attention when it’s important.

I think this is true for all humans in general. I actually think it is worse for teenagers who have more unsupervised time and don't know any better. --

FYI.. there was a program on about kids in Costa Rica or maybe Honduras where they all had chores. Even the 3 year olds. I thought it was interesting as the kids themselves were very well behaved.