DS was from 8 months, a combination of full-time some months, part-time other months and grandparents. DD will be part-time from 1 year, again with grandparents now and again.
I don't care that much about such research without reading further into it. It's not v clear to me exactly what it's saying. That there's an increase in mental health problems in youth. That there's an increase in nursery use. I can accept both. But that the two are cause and effect? An association is not proof of causality, as someone has already pointed out further down. In the same period mobile phone use has increased. Did it cause mental health problems? I know this is far fetched, but there are just too many intermediate steps and inferences from one thing to another but not exactly proof.
Furthermore, are nurseries nowadays comparable to those of 20 years ago, the ones the disturbed youth might have attended? He finds them garish. If they'd been spartan he'd have found them bleak. You can't win, can you?
He says there are increased problems in all children, regardless of wealth. Well, that's one thing. But to equate wealth with nursery attendance neccessarilly is another step that he makes. What if wealth equals SAHM?
Finally (for the time being at least) there's the ecological fallacy. The results of the study apply at population level (and I agree with you that this would be where any interventions if needed should be aimed) but not immediately at individual level. As is my case.
I didn't see the other thread but i'm glad the book suggested was useful. Which of the two was better?
I'm still to be convinced that backchat at 3 years equals violent behaviour later on.