[imarg]

My argument with my wife was not about the duration of sleep (nor has this anything to do with the schedule) but at what time a kid should go to bed. The reasoning behind this is that if a child goes to bed later it would be bad for brain development (or something) even if sleeping the required hours.

When I said that most studies are from the USA I was referring to studies in general (and about the children in particular) and not on the one discussed here. I confess, I might have been carried away a little because this has always been my pet peeve.